Non classé Cayol Valérie

Cayol Valérie

CNRS Research fellow, Habilitation à Diriger des Recherches
Volcanology group of Laboratoire Magmas and Volcanoes (LMV)
Tel: 33 (0)4.73.34.67.87
valerie.cayol@uca.fr

Two children

See page in French
  • Main research topics :

    Development of 3D numerical methods for the analysis of volcano deformations

    In order to quickly calculate deformations and stresses associated with fractures in a homogeneous and isotropic elastic medium, while taking into account realistic topographies, I combined two boundary element methods (Cayol et Cornet, IJRMMS, 1997, JGR, 1998). These numerical methods are used in inversions, which consists in determining the sources that minimize the difference between observed ground displacements and simulation results. The sources considered can be reservoirs, planar intrusions or faults (Fukushima et al., JGR, 2005). This inverse modelling method is available on the DefVolc link. To get an account, please contact me.

    Two videos present DefVolc, the first one presents the web interface and the second one presents the pre- and post-processor (in english).

    Together with my colleagues in the mathematics department, we have also developed a method of fictitious domains allowing for heterogeneities and anisotropies (Bodart et al., SIAM, JSC, 2016).

    fig5Influence of topography on the deformation signal induced by a spherical source. This interferogram of Etna covering the  1992-1993 period (a) shows a deflation that can be partly modelled by a spherical source located under a prominent volcano (c). When this deformation is modelled by neglecting the topography (b), the deformation signal is less well explained (Cayol et Cornet, GRL, 1998).
    Test synthétiques de détermination des sources à partir de méthodes de cluster (Thèse A. Augier).

    Cluster method for source determination without a-priori on their geometry. Synthetic tests are performed in which a model generated by boundary elements (meshes on the left) is inverted by the cluster method (images in the centre). Different source geometries are superimposed. The method allows to find correctly the geometries of the different sources (Thèse A. Augier).

    Study of magma transfer and storage

    These methods have been applied to Piton de la Fournaise and the Nyiragongo and Nyamuragira volcanoes in order to study how and where magma is transmitted to the volcanic edifices.

     

    Models for the eruptions of Piton de la Fournaise between March 1998 and June 2000. These models are obtained by analysing RADARSAT-1 data using boundary element modelling combined with near-neighbour inversions (Fukushima et al., JGR, 2005). They show that the eruptions correspond to shallow, horizontally elongated dikes that follow the topography. They dikes are located above the pre-eruptive seismic swarm (Fukushima et al., JGR, 2010).

    Nyigo_2002

     

    Models for the January 2002 eruption in Nyiragongo (DRC). Inversions show that the eruption was associated to two dikes: one corresponds to the eruptive fissure and is superficial, the other extends under Lake Kivu for 20 km, and stopped 2 km below the surface (Wauthier et al., JGR, 2012).

    Model_Nyamu_2010

     

     

    Models for the 2010 Nyamulagira eruption (DRC). For this eruption, the volume emitted is 10 times larger than the reservoir deflation, which can be explained by the compressibility of the magma, containing 0.1wt% CO2 (Wauthier et al., Remote Sensing, 2015).

    Magma propagation during the May 2016 Piton de la Fournaise eruption. Continuous InSAR and GNSS data were inverted simultaneously to determine how magma propagates from its source to the surface (see Smittarello et al., Remote Sensing, 2019 for the method). We determined that the propagation was jerky with an acceleration phase and a pause before a final dike was established. The volume of magma contained in the intrusion and emitted to the surface is likely to be the result of a single input at the beginning of the eruption. The final phase of propagation could be the result of stress relief from eastern flank slip or pressure from accumulated gas at the upper tip of the sill (Smittarello et al., JGR, 2019).

    Study of flank movements of volcanic edifices

    Modelling has been carried out at Kilauea, Reunion Island (Piton des Neiges and Piton de la Fournaise) in order to understand the consequences of magma intrusions on the stability of volcanic edifices.


    stresses76-82Coulomb stresses induced by the opening of Kilauea’s rift zones, which is coupled with slip on the southern flank of the volcano. This model was established from volcano deformations measured by EDM between 1976 and 1983. It shows that the seismicity is located on the part of the detachment that is blocked (Cayol et al., Science, 2000).
    Disp_slope_subh_ini

     

     

     

    Displacements induced by sill injections, possibly sheared and by faults. This study compares the internal displacement and ground surface displacement induced by a variety of fractures, whether they are intrusions, sheared intrusions or faults. It is assumed that when fractures do not emplace perpendicular to σ3, they shear under gravity (σ1). This case can occur for instance when fractures are guided by pre-existing discontinuities. As magma cancels out friction, the intrusions release shear stresses in the same way as a zero-friction fault. Here k =σ3/σ1 = 0.6 (Cayol et al., JGR, 2014).

    Inversion of the flank displacements that occurred during the April 2007 eruption of Piton de la Fournaise. The April 2007 eruption was exceptional in several respects: the volumes of lava emitted were the largest of the XX and XXI century (240 x 106 m3), a collapse of the summit caldera by 340 m occurred, as well as a flank slip of 1.4 m towards the east. This study aims to understand the origin of the east flank slip. The most commonly accepted model for volcano flank slips is that they result from movement on faults, triggered by repeated magma intrusions. Recently, another flank slip model has been suggested by structural geology studies at Piton des Neiges (Famin et al., 2010; Chaput et al., 2014), the extinct neighbour of Piton de la Fournaise. In this model, flank slip would be induced by the emplacement of intrusions along pre-existing discontinuities, such that the intrusions undergo shearing, similar to that induced on faults. The study of post-2007 flank displacements shows that these are the result of compaction and shearing of a fracture parallel to topography, located 500 m below the ground surface. We find that the compaction is too large to be attributed to a termically contracting sill, and seems rather related to the compaction of a detached fold probably located at the interface between old flows (Tridon et al., JGR, 2016).

    Combining inversions of deformation with inversions of seismic rates for faults whose friction follows rate and state laws (Dieterich, 1994)

    figure08-revisedModel for the Kilauea eruptions of 1983 and 1977. By comparing Coulomb stresses from numerical boundary element calculations (A and B) and inversions using seismicity rates (C and D), we validated that earthquake rates can be used to infer stress changes and we found that these eruptions corresponded to the vertical propagation of a dike from rift-zones (B), rather than a horizontal propagation from the summit area (A) (Dieterich et al., Nature, 2000; Dieterich et al., USGS Prof. Pap., 2003)

    Joint inversion of muography and gravimetry data

    Both gravimetric and muographic data are used to determine crustal densities. However, inversions of these data are ill-posed inverse problems. By combining gravity and muography, density determinations are improved. Nevertheless, the inversions depend on hyperparameters (a variance on the a priori density, σρ, and a characteristic smoothing distance, λ), which are most often determined ad-hoc or with reference to a single test case. These hyperparameters have a crucial influence on the recovered densities and their wrong estimation can lead to artefacts. Furthermore, densities imaged by gravimetry and muography often differ by a constant. Our studies, based on a Bayesian formalism, is aimed at developing robust methods for determining the hyperparameters (Barnoud et al., GJI, 2019) and the offset between imaged densities (Lelièvre et al., GJI, 2019). To this end, tests were carried out on a fictitious volcano whose geometry is close to Puy de Dôme. These methods were then applied to Puy de Dôme (Barnoud et al., Frontiers In Earth Sciences, 2021). See the CNRS communication “Voyage au centre du puy de Dôme“.

    The most robust method for determining hyperparameters is the Leave-One-Out method. It consists in determining the parameters that allow the best recovery of measurements at points omitted in the inversion. The minimum of this criterion (white point on the top figure) corresponds well to a model close to the initial model (bottom figures) (adapted from Barnoud et al., GJI, 2019) The offset determined by linear least squares gives an inverse model very close to the initial model. The density discontinuities of the initial model are represented by the white lines (de Lelièvre et al., GJI, 2019)

     


    Studied volcanoes :

    Piton de la Fournaise volcano (Réunion Island, France), Nyiragongo and Nyamulagira volcanoes (Democratic Republic of Congo), Kilauea Volcano (Hawaii, U.S.A.), Soufriere Hills volcano (Montserrat, West Indies).

     

  • Mentoring :

    Scientific and administrative responsibilities :

    • 2020-present: In charge of the Volcanology group;
    • 2019-present: member of the organizing committee of the Laboratory of Excellence ClerVolc. In charge of theme 2 dedicated to the structure and the deformation of volcanic edifices.
    • 2018-present: elected member of the scientific committee of Observatoire de Physique du Globe de Clermont.
    • 2007-2016: Member of the scientific committee of Vulcania in St Ours.
    • 2011-2016: in charge of the computer commission for Laboratoire Magmas et volcans.
    • 1999-2003: Member of the laboratory committee for Laboratoire Magmas et Volcans

    Conference organization :

    • 2019 : member of the scientific committee of the MDIS-Form@ter conference which took place from October 14 to 18, October 2019.
    • 2017 : Co-organization (with J.L. Froger) of the MDIS-Form@ter conference which took place from the 16 to the 20 of October 2017.
    • 2015 : Member of the organizing committee of the GeoMod, which took place in 2016.
    • 2015 : member of the scientific committee of the MDIS ForM@Ter workshop (Deformation measurement by space imagery) : October 7-8-9th, Autrans, Octobre 2015.
    • 2012: Member of the program committee for the AGU Chapman conference “Hawaiian volcanoes, from source to surface“, Hawaii
    • 2011: Member of the scientific committee for the EFIDIR spring school (fttp://www.efidir.fr) at les houches, April 2011.
    • 2001-2004: Seminar organization for the Laboratoire Magmas et Volcans.
    • 2012-2014: Steering committee member for Belgium Federal Science Policy Office (Belspo) project on Earth observation VI-X : Study and monitoring of Virunga volcanoes using Tandem-X.

    Evaluation activities :

    • 2019-present : Member of the Advisory Board of the Center for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics (COMET)
    • 2018-2019 : Participation to the selection committee for the Fulbright fundation au comité de selection de la fondation Fulbright for exact and applied sciences, and for earth and life sciences. Evaluation of researchers and PhD student projects.
    • 2017 – present : member of the evaluation committee of the CNRS-INSU TelluS-ALEA projects.
    • PhD examiner for the thesis of Aline Peltier at University of la Réunion (july 2008), Paola Traversa at LGIT, University Joseph Fourier at Grenoble (october 2009), Fabien Albino at LGIT, University Joseph Fourier at Grenoble (Jan. 2011), Andrew Toombs at the University of Reading (June, 2011), Agathe Schmid at LGIT, University Joseph Fourier at Grenoble (Oct. 2011), Anne Obermann (LGIT, 2013).
    • Member of recruiting committee at ISTerre at Université de Savoie (2010), Institut de physique du Globe de Paris (2019), Ecole nationale Supérieure de Géologie de Nancy (2021).
    • 2012 and 2001: Member of the permanent Jury for Master2 at LMV.
    • Reviews for Nature Geoscience, Tectonophysics, Journal of Geophysical Research, Geophysical research Letter, Journal of Volcanology and Geothermal Research, Physics of the Earth and Planetary Interior, Bulletin of Volcanology.
    • Reviews of projects for the U.S. National Science Fundation, Icelandic Research Fund, Observatoire des Sciences de l’Univers de Grenoble (OSUG), for the Italian Instituto Nazionale di Geofisica E Vulcanologica (INGV).

    Distinctions :

    • 2016-2017 : Fulbright researcher grant of 6 mois for the Cascade Volcano Observatory;
    • Citation for Excellence of a Review at Geophysical Research Letter (2019);
    • Subjects : Numerical modelling, rock mechanics,  geophysics.
    • Niveau : Master 1, Master 2.
  • Collaborations :

    • Laboratoire de Mathématiques de l’Institut Camille Jourdan à St Etienne, in the framework of a CNES grant.
    • laboratoire de Mathématiques (LM) et Laboratoire d’Informatique, Modélisation et Optimisation des Systèmes (LIMOS), Laboratoire de Physique Corpusculaire (LPC) de l’Université B. Pascal dans le cadre du laboratoire d’excellence Clervolc.
    • IsTerre, Université de Savoie, Le-Bourget-du-Lac
    • Université de la Réunion, IPGP‎.
    • Royal Museum for central Africa, Tervuren, Belgium.
    • National Museum of Natural History, Walferdange, Luxembourg
    • Research Center for Earthquake Prediction, Disaster Prevention Research Institute, Kyoto University, Japan.
    • The Pennsylvania State University, Etats-Unis
    • UC Riverside, Etats-Unis.
    • Cascade Volcano Observatory, U.S.G.S.

    Journeys in foreign laboratories :

    • 2016-2017: Journey at the Cascade Volcano Observatory of l’U.S. Geological Survey, Fulbright Research Grantee.
    • 1996-1997: Post-Doctorat at the U.S. Geological Survey in Menlo Park, Californie, U.S.A. Research subject : joint inverions of micro-earthquakes and deformations to determine stress changes associated to Kilauea (Hawaii).
  • Publications since 2010 :

    • Barnoud A., Cayol V., Lelièvre P.G., Portal A., Labazuy P., Boivin P., Gailler L. (2021). Robust Bayesian Joint Inversion of Gravimetric and Muographic Data for the Density Imaging of the Puy de Dôme Volcano (France). Frontiers in Earth Science vol.8, p.575842, - DOI:10.3389/feart.2020.575842 - lien HAL .
    • Shreve T., Grandin R., Smittarello D., Cayol V., Pinel V., Boichu M., Morishita Y. (2021). What triggers caldera ring-fault subsidence at Ambrym volcano? Insights from the 2015 dike intrusion and eruption. Journal of Geophysical Research - Solid Earth vol.126, p.e2020JB020277, 6, - DOI:10.1029/2020JB020277.

    • Bodart O., Cayol V., Dabaghi F., Koko J. (2020). Fictitious domain method for an inverse problem in volcanoes. vol.138, Domain Decomposition Methods in Science and Engineering XXV Series: Lecture Notes in Computational Science and Engineering, Editors Haynes, R., MacLachlan, S., Cai, X.-C., Halpern, L., Kim, H.H., Klawonn, A., Widlund, O., Springer International Publishing (ed.), - DOI:10.1007/978-3-030-56750-7.

    • Barnoud A., Cayol V., Niess V., Cârloganu C., Lelièvre P., Labazuy P., Le Menedeu E. (2019). Bayesian joint muographic and gravimetric inversion applied to volcanoes. Geophysical Journal International vol.218, p.2179-2194, - DOI:10.1093/gji/ggz300.
    • Lelièvre P.G., Barnoud A., Niess V., Cârloganu C., Cayol V., Farquharson C.G. (2019). Joint inversion methods with relative density offset correction for muon tomography and gravity data, with application to volcano imaging. Geophysical Journal International vol.218, p.1685-1701, - DOI:10.1093/gji/ggz251.
    • Maccaferri F., Smittarello D., Pinel V., Cayol V. (2019). On the Propagation Path of Magma Filled Dikes and Hydrofractures: The Competition Between External Stress, Internal Pressure, and Crack Length. Geochemistry, Geophysics, Geosystems vol.20, p.2064-2081, - DOI:10.1029/2018GC007915.
    • Smittarello D., Cayol V., Pinel V., Froger J.L., Peltier A., Dumont Q. (2019). Combining InSAR and GNSS to Track Magma Transport at Basaltic Volcanoes. Remote Sensing vol.11, p.2236, - DOI:10.3390/rs11192236.
    • Smittarello D., Cayol V., Pinel V., Peltier A., Froger J.L., Ferrazzini V. (2019). Magma propagation at Piton de la Fournaise from joint inversion of InSAR and GNSS. Journal of Geophysical Research - Solid Earth - DOI:10.1029/2018JB016856.

    • Bodart O., Cayol V., Court S., Koko J. (2016). Fictituous domain method for fracture models in elasticity, Progress in industrial mathematics at ECMI 2014. vol.22, Editors G. Russo, V. Capasso, G. Nicosia, V. Romano, ISBN 978-3-319-23412-0, Springer International Publishing (ed.).
    • Bodart O., Cayol V., Court S., Koko J. (2016). XFEM-Based fictious domain method for linear elasticity model with crack. SIAM Journal on Scientific Computing (SISC) vol.38, p.B219-246, 2, - DOI:10.1137/15M1008385.
    • Froger J.L., Cayol V., Famin V. (2016). The March-April 2007 eruption of Piton de la Fournaise as recorded by interferometric data. In: P. Bachèlery, L., J.F., Di Muro, A., Michon, L. (Editors) (ed.) Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala. Active Volc.
    • Tridon M., Cayol V., Froger J.L., Augier A., Bachèlery P. (2016). Inversion of coeval shear and normal stress of Piton de la Fournaise flank displacement. Journal of Geophysical Research - Solid Earth vol.121, - DOI:10.1002/2016JB013330.

    • Carey R., Cayol V., Poland M., Weis D. (2015). Hawaiian Volcanoes, From Source to Surface. vol.208, p.600, Hawaiian Volcanoes, From Source to Surface, Geophysical Monograph Series, Wiley (ed.), SBN: 978-1-118-87204-8, - DOI:10.1002/9781118872079.
    • Carey R., Cayol V., Poland M., Weis D. (2015). Hawaiian Volcanoes, From Source to Surface, Geophysical Monograph Series. vol.208, p.600 p., ISBN: 978-1-118-87204-8, Wiley (ed.), - DOI:10.1002/9781118872079.
    • Froger J.L., Famin V., Cayol V., Augier A., Michon L., Lénat J.F. (2015). Time-dependent displacements during and after the April 2007 eruption of Piton de la Fournaise, revealed by interferometric data. Journal of Volcanology and Geothermal Research vol.296, p.55-68, - DOI:10.1016/j.jvolgeores.2015.02.014.
    • Wauthier C., Cayol V., Smets B., d’Oreye N., Kervyn F. (2015). Magma pathways and their interactions inferred from InSAR and stress modeling at Nyamulagira Volcano, D.R. Congo. Remote Sensing vol.7, p.15179-15202, - DOI:10.3390/rs71115179.

    • Cayol V., Catry T., Michon L., Chaput M., Famin V., Bodart O., Froger J.L., Romagnoli C. (2014). Sheared sheet intrusions as mechanism for lateral flank displacement on basaltic volcanoes: Application to Réunion Island volcanoes. Journal of Geophysical Research Letters 119. - DOI:10.1002/2014JB011139.
    • Remy D., Froger J.L., Perfettini H., Bonvalot S., Gabalda G., Albino F., Cayol V., Legrand D., De Saint Blanquat M. (2014). Persistent uplift of the Lazufre volcanic complex (Central Andes): New insights from PCAIM inversion of InSAR time series and GPS data. Geochemistry Geophysics Geosystems 15. - DOI:10.1002/2014GC005370.

    • Wauthier C., Cayol V., Poland M., Kervyn F., d’Oreye N., Hooper A., Samsonov S., Tiampo K., Smets B. (2013). Nyamulagira’s Magma Plumbing System Inferred from 15 years of InSAR, Remote Sensing of Volcanoes and Volcanic Processes : Integrating .Oservations and Modelling, p.. - DOI:10.1144/SP380.9.

    • Froger J.L., Souriot T., Villeneuve N., Rabaute T., Durand P., Cayol V., Di Muro A., Staudacher T., Fruneau B. (2012). Apport des données TerraSAR-X pour le suivi de l’activité du Piton de la Fournaise. Revue Française de Photogrammétrie et de Télédétection 197, 86-101. .
    • Wauthier C., Cayol V., Kervyn F., d’Oreye N. (2012). Magma sources involved in the 2002 Nyiragongo eruption, as inferred from an InSAR analysis. Journal of Geophysical Research 117, B05411. - DOI:10.1029/2011JB008257..

    • Fukushima Y., Cayol V., Durand P., Massonnet D. (2010). Evolution of magma conduits during the 1998–2000 eruptions of Piton de la Fournaise volcano, Réunion Island Journal of Geophysical Research 115, B10204, 21 PP., 2010. - DOI:10.1029/2009JB007023.

    Previous publications :

    • Battaglia J. and V. Cayol, A comment on “Hidden dykes detected on Ultra Long Period seismic signals at Piton de la Fournaise volcano ?” by Houlié N. and Montagner J.-P., Earth Planet. Sc. Let., 287, 1-2, 284-287, doi:10.1016/j.epsl.2009.06.023, 2009.
    • Peltier A., Hurst T, Scott B., Cayol V., Structures involved in the vertical deformation at Lake Taupo (New Zealand) between 1979 and 2007: New insights from numerical modelling, J. Geophys. Res., 181, 173–184, doi:10.1016/j.jvolgeores.2009.01.017, 2009.
    • Peltier, A., T. Staudacher, P. Bachèlery, V. Cayol, Formation of the April 2007 caldera collapse at Piton de La Fournaise volcano: insights from GPS data, J. Volcano. Geotherm. Res., 184, 152-163, doi:10.1016/j.jvolgeores.2008.09.009, 2009.
    • Michon L., V. Cayol, L. Letourneur, A. Peltier, N. Villeneuve, T. Staudacher, Edifice growth, deformation and rift zone development in basaltic setting: insights from Piton de la Fournaise shield volcano (Réunion Island, Indian Ocean). J. Volcanol. Geotherm. Res., 184, 14–30, doi:10.1016/j.jvolgeores.2008.11.002, 2009.
    • Peltier A., V. Famin, P. Bachèlery, V. Cayol, Y. Fukushima, T. Staudacher, Cyclic magma storages and transfers at Piton de La Fournaise volcano (La Reunion hotspot) inferred from deformation and geochemical data, Earth. Planet. Sci. Lett., 270, 2-4, 180-188, doi:10.1016/j.epsl.2008.02.042, 2008.
    • Green, D. N.*, J. Neuberg, and V. Cayol, Shear stress along the conduit wall as a plausible source of tilt at Soufrière Hills volcano, Montserrat, Geophys. Res. Lett., 33, L10306, doi:10.1029/2006GL025890, 2006.
    • Fukushima Y.*, V. Cayol and P. Durand, Finding realistic dike models from interferometric synthetic aperture radar data: The February 2000 eruption at Piton de la Fournaise, J. Geophys. Res., 110, B03206, doi: 10.1029/2004JB003268, 2005.
    • Dieterich J., V. Cayol, and P. Okubo, Stress Changes Prior to and During the Pu’u O’o Eruption of Kilauea Volcano, U.S. Geological Survey Prof. Paper, 1676, 187-201, 2003.
    • Dieterich, J., V. Cayol et P. Okubo, The Use of Earthquake rates as a stress-meter at Kilauea Volcano, Nature, 408 : 457-460, 2000.
    • Cayol, V., J. Dieterich., A. Okamura et A. Miklius, High Magma Storage Rates Before the 1983 Eruption of Kilauea, Hawaii, Science, 288, 2343-2346, 2000.
    • Briole, P., A. Avallone, F. Beauducel, A. Bonforte, V. Cayol, C. Deplus, C. Delacourt, J.-L. Froger,] B. Malengreau, G. Puglisi, Interférométrie radar appliquée aux volcans : cas de l’Etna et des champs Phlégréens (Italie), Comité National Français de Géodésie et Géophysique, Rapport quadrienal 1995-1998, 121-128, 1999.
    • Cayol, V., et F. H. Cornet (1998), 3D Modeling of the 1983-1984 Eruption at Piton de la Fournaise Volcano, Réunion Island, Indian Ocean, J. Geophys. Res., 103,18,025-18,037, 1998.
    • Cayol, V., and F.H. Cornet, Effect of Topography on the interpretation of the deformation field of prominent volcanoes – Application to Etna, Geophys. Res. Let., 25, 1979-1982, 1998.
    • Cayol, V., et F. H. Cornet, 3D Mixed Boundary Elements for Elastic Deformation Field Analysis, Int. J. Rock Mech. Min. Sci.& Geomech. Abstr., 34, 275-287, 199.

    *Ph. D. study under my supervision

    Conferences and invited seminars :

    • Cayol, V., C. Wauthier, N. D’Oreye, F. Kervyn, M. Tridon, J.L. Froger, Assets of determining stress changes from InSAR displacement with examples from the Kivu Volcanic Region and Piton de la Fournaise volcano, COMET annual meeting, York, U.K., Juin 2019.
    • Cayol, V., Smittarello D., V. Pinel, A. Peltier, J.-L. Froger, magma associated to Piton de la Fournaise eruptions from joint inversion of InSAR and GNSS data, 26ème Réunion des Sciences de la Terre, Lille, France. Nov., 2018.
    • Cayol, V., A. Augier, S. Court, J.−L. Froger, S. Menassian, Improved Cluster of Volume Strain Method Applied to Volcano Deformation, IAVCEI 2017 Scientific Assembly, Portland, USA, aout 2017.
    • V. Cayol, Detecting intrusions from deformations with applications to Piton de la Fournaise and Nyiragongo, Earth Flow seminar, Oslo, June 2016.
    • V. Cayol, Methods for tracking magma movements from deformation with applications to Piton de la Fournaise and RDC volcanoes, MEMOVOLC workshop, Feb. 2015.
    • V. Cayol, Wauthier, C., F. Kervyn and N. d’Oreye, Magma driven extension in an immature continental rift based on InSAR observations of Nyiragongo Volcano in 2002, 96th Journées Luxembourgeoises de Géophysique, 24-25 novembre 2011.
    • Wauthier*V.Cayol, et al., Nyiragongo Volcano 2002 Eruption Constrained by Multibeam InSAR Data, European Geophysical Union, Avril 2011.
    • Cayol V., Augier A., et J.L. Froger, Apports de l’interférométrie radar à l’étude de l’éruption de mars-avril 2007 au Piton de la Fournaise, Colloque autour de l’ANR EFIDIR, Aussois, 1-3 avril 2010.
    • Cayol V., J.-L. Froger,Y. Fukushima, A. Augier, Ph. Durand et D. Massonnet, Apports de l’interférométrie radar à la connaissance du Piton de la Fournaise, Ecole thématique du CNRS “Identification à partir des mesures de Champs – Application à la mécanique des matériaux et des structures”, Clermont-Ferrand, Juin 2009.
    • Cayol V.,, C. Wauthier, N. D’Oreye, F. Kervyn, Deformation modelling from multiswath InSAR data at Nyiragongo and Nyamulagira volcano, Workshop, Evaluating, Monitoring and Communicating Volcanic and Seismic Hazards in East Africa, Trieste, Italie, 17-28 August 2009.
    • Cayol V., Tinard P., Froger J.-L., Fukushima Y. : New Insights on Piton de la Fournaise Volcanic Activity Inferred from a Multiple Swath InSAR Monitoring (La Réunion Island), Assemblée Générale de l’IAVCEI, Reykjavik, Islande, août 2008.
    • Cayol, V., Y. Fukushima, P. Tinard, J.-L. Froger, Ph. Durand, T. Souriot et D. Massonnet : Apports de la télédétection spatiale à la connaissance du Piton de la Fournaise, La Réunion face aux risques naturels : gouvernance locale et coopération régionale , St Denis de la Réunion, septembre 2006.
    • FukushimaV. Cayol, P. Durand, and D. Massonnet, Complex dike emplacements at Piton de la Fournaise revealed by InSAR and their implications on the magma transfer mechanism, Western Pacific Geophysics Meeting, Beijing, China, Juillet 2006.
    • V. Cayol, Fukushima, Y., Geometry of magmatic conduits at Piton de la Fournaise, European Geophysical Union, Vienne, Autrice, Avril 2006.
    • V. Cayol, Fukushima, Y., P. Durand: Finding realistic dike models from Insar Data: Applications to 1998-2000 eruptions at Piton de la Fournaise, RSPSoc Annual Meeting, Portsmouth, G.B., Septembre 2005.
    • Dieterich J. H., Cayol, V., Okubo, P.: Stresses Associated to the Onset of the Pu’u ‘O’o-Kupaianaha Eruption, American Geophysical Union, San Francisco, U.S.A., Décembre 2003.
    • Invited seminars at department of seismologyIPGP laboratoire de Géophysique Interne et Tectonophysique (LGIT) of University J. Fourier, Grenoble (1998)laboratoire de Dynamique Terreste et Planétaire, Observatoire Midi Pyrénée, University of Toulouse, laboratoire de Mécanique des Roches department of Geophysics of the University of Leeds, University J. Fourier, Grenoble (2009), Univ. de la Réunion, Penn State University, Cornell University, University of Oregon, Eugene, OR, USA (May 2017), USGS Cascade Volcano Observatory, Vancouver, WA, USA (May 2017), University of California Riverside, Riverside, CA, USA (May 2017), Ecole normale Supérieur de Paris (2018), Laboratoire de Géologie, Université Lyon 1 (2019).

    Rangs B et C : 165  conference communications

    • Barnoud A., Cayol V., Lelièvre P., Niess V., Cârloganu C., Le Ménédeu (2020). Bayesian joint inversion of muographic and gravimetric data for the 3D imaging of volcanoes, case study of the Puy de Dôme. EGU General Assembly, Avril 2020.
    • Cayol V., Dabaghi F., Fukushima Y., Tridon M., Smittarello D., Bodart O., Froger J.L. (2020). DefVolc: Interface and web service for fast computation of volcano displacement. EGU General Assembly, Avril, 2020.
    • Cayol V., Dabaghi F., Tridon M., Smittarello D., Bodart O., Froger J.L. (2020). DefVolc: Interface and web service for fast computation of volcano displacement. JpGU Vitual Meeting, Juil., 2020.
    • Cayol V., Smittarello D., Pinel V., Peltier A., Froger J.L. (2020). Combining InSAR and GNSS to model magma transport during the May 2016 eruption of Piton de la Fournaise Volcano (La Réunion Island). JpGU Vitual Meeting, Juil. 2020.
    • Cayol V., Smittarello D., Pinel V., Peltier A., Froger J.L. (2020). Combining InSAR and GNSS to model magma transport during the May 2016 eruption of Piton de la Fournaise Volcano (La Réunion Island). JpGU, Juil..

    • Barnoud A., Cayol V., Gailler L., Smittarello D., Bodart O., Dumont Q., Hrysiewicz A., Dabaghi F., Froger J.L., Peltier A., Chevrel O., Roult J., Chaput M. (2019). Towards joint modelling and inversion of surface displacements and microgravimetric temporal variations for the characterization of eruptive sources at the Piton de la Fournaise volcano. 4èmes Rencontres Scientifiques et Techniques RESIF 2019, Biarritz (64), France.
    • Barnoud A., Cayol V., Gailler L., Smittarello D., Bodart O., Dumont Q., Hrysiewicz A., Dabaghi F., Froger J.L., Peltier A., Chevrel O., Roult J., Chaput M. (2019). Towards joint modelling and inversion of surface displacements and microgravimetric temporal variations for the characterization of eruptive sources at the Piton de la Fournaise volcano. Workshop MDIS-2019 / Mesure de la Déformation par Imagerie Satellitaire, La Petite-Pierre (67), France.
    • Cayol V., Wauthier C., D'Oreyre N., Kervyn F., Tridon M., Froger J.L. (2019). Assets of determining stress changes from InSAR displacement at Kivu and Reunion. 100th Journées Luxembourgeoise de Geodynamique, Focus on the Kivu Region, EGCS, Luxembourg, 27-28 mars 2019.
    • Cayol V., Wauthier C., D’Oreye N., Kervyn F., Tridon M., Froger J.L. (2019). Assets of determining stress changes from InSAR displacement with examples from the Kivu Volcanic Region and Piton de la Fournaise volcano. COMET annual meeting, York, U.K., Juin 2019.
    • Dabaghi F., Bodart O., Cayol V., Koko J. (2019). Determination of fracture pressure distribution based on fictitious domain. MDIS-Form@ter Workshop, La Petite-Pierre, Octobre 2019.
    • Dumont Q., Cayol V., Froger J.L. (2019). Orbital pass weighting of InSAR data for displacement inversion: Application to Piton de la Fournaise eruption. MDIS, Strasbourg, France, Octobre 2019.
    • Froger J.L., Pinel V., Bato M., Tridon M., Smittarello D., Prival J.M., Hrysiewicz A., Cayol V., Guéhenneux Y. (2019). Apport des données SAR à la compréhension et à la surveillance des volcans ; exemple du Piton de la Fournaise. Revue Française de Photogrammétrie et de Télédétection vol.219-220, p.83-90.
    • Maccaferri F., Smittarello D., Pinel V., Cayol V. (2019). On the propagation path of magma-filled dykes and hydrofractures: the competition between external stress, internal pressure, and crack length. EGU General Assembly, Avril 2019.
    • Pinel V., Smitarello D., Maccaferri F., Rivalta E., Cayol V. (2019). Stress field control on magma path and velocity. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2019.
    • Smittarello D., Pinel V., Maccaferri F., Cayol V. (2019). elocity variations of a propagating dyke in presence of an external stress field: insights from analogue models. EGU General Assembly, Avril 2019.
    • Smittarello D., Shreve T., Grandin R., Cayol V., Pinel V., Delgado F., Morishita Y. (2019). Caldera ring-faulting during the 2015 Ambrym dike intrusion and the search for the missing deflation source. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2019.

    • Barnoud A., Cayol V., Niess V., Cârloganu C., Lelièvre P., Labazuy P., Le Ménédeu E. (2018). Imaging of the puy de Dôme volcano from gravimetric and muographic data. Journées scientifiques : Le volcanisme - origines, aléas et risques, Clermont-Ferrand.
    • Barnoud A., Cayol V., Niess V., Cârloganu C., Lelièvre P., Labazuy P., Le Ménédeu E. (2018). Inversion jointe de données muographiques et gravimétriques avec un formalisme Bayésien. Application au puy de Dôme. Colloque G2, Montpellier.
    • Barnoud A., Cayol V., Niess V., Cârloganu C., Lelièvre P., Le Ménédeu E. (2018). Joint inversion of muographic and gravimetric data with a Bayesian formalism for the 3D density imaging of volcanoes. EGU General Assembly, Vienne, Autriche.
    • Bodart O., Dabaghi F., Cayol V., Koko J. (2018). An optimal control problem based on a fictitious domain method for inversion of the pressure contribution on the crack in the volcanic concepts. 25th International Domain Decomposition Methods Conference, St Johns, Newfoundland, Canada, Autriche, July 2018.
    • Cayol V., Tridon M., Froger J.L., Richards- Dinger K., Dieterich J. (2018). Piton de la Fournaise Flank Displacement following the March 2007 eruption. Cities of Volcanoes, Naples, Italie, Sept. 2018.
    • Cayol V., Tridon M., Froger J.L., Richards-Dinger K., Dieterich J., Augier A. (2018). Piton de la Fournaise Flank Displacement following the March 2007 eruption. 19th General assembly of Wegener, Grenoble, France, Sept., 2018.
    • Dumont Q., Cayol V., Froger J.L. (2018). Link between fl ank slip and eruptions at Piton de la Fournaise (La Réunion). Wegener, Grenoble, France, Sept 2018.
    • Dumont Q., Cayol V., Froger J.L. (2018). Link between flank slip and eruptions at Piton de la Fournaise volcano (La Réunion). 19th General assembly of Wegener, Grenoble, France, Sept., 2018.
    • Lelievre P., Barnoud A., Cârloganu C., Cayol V., Farquharson C., Niess V. (2018). Joint inversion of gravity and muon tomography data on unstructured meshes. European Geophysical Society meeting, Vienne, Autriche.
    • Lelievre P., Barnoud A., Cârloganu C., Cayol V., Farquharson C., Niess V. (2018). Joint inversion of gravity and muon tomography data on unstructured meshes. European Geophysical Society meeting, Vienne, Autriche.
    • Maccaferri F., Smittarello D., Pinel V., Cayol V. (2018). On the propagation path of magma-filled dykes and hydrofractures:the competition between external stress, internal pressure, and crack length. Geomod Conference, Barcelona, Spain, Oct. 2018.
    • Pinel V., Maccaferri F., Rivalta E., Michaut C., Smitarello D., Carrara A., Cayol V. (2018). What controls the arrival of magma at the surface? Interplay between buoyancy and crustal stress field. Cities of Volcanoes, Naples, Italie, Sept. 2018.
    • Smittarello D., Cayol V., Pinel V., Peltier A., Froger J.L. (2018). Basaltic Magma Propagation: Insight from Inversion of InSAR and GNSS data of the May 2016 Piton de la Fournaise eruption. Cities of Volcanoes, Naples, Italie, Sept. 2018.
    • Smittarello D., Cayol V., Pinel V., Peltier A., Froger J.L. (2018). Propagation of magma associated to Piton de la Fournaise eruptions from joint inversion of InSAR and GNSS data. 19th General assembly of Wegener, Grenoble, France, Sept., 2018.
    • Smittarello D., Cayol V., Pinel V., Peltier A., Froger J.L. (2018). Propagation of magma associated to Piton de la Fournaise eruptions from joint inversion of InSAR and GNSS data. 26ème Réunion des Sciences de la Terre, Lille, France, Nov., 2018.

    • Cayol V. (2017). Flank Displacement at Reunion Island. Départment of Geosciences, Pennsylvania State University, State College, PA, USA, Avril 2017.
    • Cayol V. (2017). Flank Displacement at Reunion Island. Department of Earth and Atmospheric Sciences at Cornell University, Ithaca, NY, USA, avril 2017.
    • Cayol V. (2017). Flank Displacement at Reunion Island. Department of Earth Sciences, University of Oregon, Eugene, OR, USA, May 2017.
    • Cayol V. (2017). Flank Displacement at Reunion Island. US Geological Survey, Cascade Volcano Observatory, Vancouver, WA, USA, May 2017.
    • Cayol V. (2017). Flank Displacement at Reunion Island. Department of Earth Sciences, U.C. Riverside, Riverside, CA, May 2017.
    • Cayol V., Augier A., Court S., Froger J.L., Menassian S. (2017). Improved Cluster of Volume Strain Method Applied to Volcano Deformation. IAVCEI Scientific Assembly, Invited, Portland, Oregon, USA, August 2017.
    • Cayol V., Tridon M., Froger J.L., Augier A. (2017). Inversion of Coeval Shear and Normal Stress of Piton de la Fournaise Flank Displacement. IAVCEI Scientific Assembly, Portland, Oregon, USA, August 2017.
    • Froger J.L., Cayol V. (2017). MDIS-Form@ter Workshop. Besse en Chandesse, Octobre 2017.
    • Froger J.L., Cayol V., Tridon M., Bato M., Remy D., Chen Y., Smittarello D., Pinel V., Hrysiewicz A., Prival J.M., Villeneuve N., Peltier A., Augier A., Rivet S., Guéhenneux Y. (2017). Indian Ocean InSAR Observatory (OI2) – Routine Interferometric Monitoring of a Volcanic Island, the Piton de la Fournaise. MDIS-Form@ter Workshop, Besse en Chandesse, Octobre 2017.
    • Froger J.L., Cayol V., Tridon M., Bato M., Remy D., Chen Y., Smittarello D., Pinel V., Prival J.M., Villeneuve N., Peltier A., Augier A., Rivet S., Guéhenneux Y. (2017). Indian Ocean InSAR OBSERVATORY (oi2) – Routine Interferometric Monitoring of a VOLCANIC ISLAND. Fringe 2017 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop, Helsinki, juin 2017.
    • Hrysiewicz A., Froger J.L., Menand T., Cayol V. (2017). Caractérisation des déplacements liés aux coulées de lave au Piton de la Fournaise à partir de données InSAR. Journée thématique du PNTS, Paris, Mars 2017.
    • Hrysiewicz A., Froger J.L., Menand T., Cayol V. (2017). InSAR characterization of displacements related to lava flows at Piton de la Fournaise. MDIS-Form@ter Workshop, Besse en Chandesse, Octobre 2017.
    • Hrysiewicz A., Menand T., Froger J.L., Cayol V., Remy D. (2017). Origin of measured surface displacements at the volcanic complex of Lastarria-Cordon Del Azufre between 1996 and 2010: Insights from numerical simulations. MDIS-Form@ter Workshop, Besse en Chandesse, Octobre 2017.
    • Le Corvec N., Menand T., Cayol V., Froger J.L. (2017). Incremental growth of magma reservoirs: Insights on the room problem through the use of finite element models. IAVCEI 2017, ME13B-076. Poster Presentation.
    • Le Corvec N., Menand T., Cayol V., Froger J.L. (2017). Incremental growth of magma reservoirs: Insights on the room problem through the use of finite element models. MDIS-Form@ter 2017 – Mesure de la Deformation par Imagerie Satellite, 166099. Poster Presentation.
    • Smittarello D., Cayol V., Pinel V., Peltier A., Froger J.L. (2017). Basaltic intrusions propagation modeling based on InSAR and GNSS data, application to the May 2016 Eruption of Piton de la Fournaise Volcano (La Réunion Island). MDIS-Form@Ter Colloque, Besse en Chandesse, 18-20 Octobre.
    • Tridon M., Cayol V., Froger J.L., Richards-Dinger K., Dieterich J. (2017). Piton de la Fournaise Flank Displacement during the March-April 2007 eruption. MDIS-Form@ter Workshop, Besse en Chandesse, Octobre 2017.

    • Augier A., Cayol V., Froger J.L., Menassian S. (2016). Improved Cluster Method Applied to the InSAR data of the 2007 Piton de la Fournaise eruption. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2016.
    • Cayol V. (2016). Detecting intrusions from deformations with applications to Piton de la Fournaise and Nyiragongo. Earth Flow Seminars, Oslo, Norvège, juin 2016.
    • Cayol V., Tridon M., Froger J.L., Augier A., Bachèlery P. (2016). Inversion of Coeval Shear and Normal Stress of Piton de la Fournaise Flank Displacement. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2016.
    • Froger J.L., Cayol V., Tridon M., Bato M., Prival J.M., Villeneuve N., Peltier A., Augier A., Sivet S., Guehenneux Y. (2016). Observatoire InSAR de l'Océan Indien (OI2) - Le Piton de la Fournaise, un volcans sous haute surverillance. Revue d'Auvergne vol.260-261, p.277-298.
    • Geirsson H., Smets B., D'Oreye N., Cayol V., Samsonov S., Kervyn F. (2016). Source processes of near-field deformation accompanying recent lava lake level decrease at Nyiragongo, DR. Congo. European Geophysical Society, Avril 2016.
    • Niess V., Barnoud A., Le Ménédeu E., Cayol V., Carloganu C. (2016). Density Imaging of Puy de Dôme Volcano by Joint Inversion of Muographic and Gravimetric Data. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2016.
    • Niess V., Barnoud A., Le Ménédeu E., Cayol V., Carloganu C. (2016). Density Imaging of Puy de Dôme Volcano by Joint Inversion of Muographic and Gravimetric Data. American Geophysical Union Fall Meeting, San Francisco, U.S.A., Dec 2016.

    • Bato M.G., Froger J.L., Tridon M., Cayol V., Harris A., Villeneuve N. (2015). InSAR Mapping of displacements and lava flows related to recent eruptions (2010-2014) at Piton de la Fournaise. Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.
    • Bodart O., Cayol V., Court S., Koko J. (2015). Méthode de domaines fictifs pour l'inversion des déformations en milieu hétérogène. Atelier ForM@Ter MDIS (Mesure de Déformations par Imagerie Spatiale), Autrans, Oct. 2015.
    • Bodart O., Court S., Cayol V., Koko J. (2015). Moving interfaces in Finite Element Methods: A fictitious domain approach. 13th US National Congress on Computational Mechanics, 26-30 juillet 2015, San Diego, CA.
    • Cayol V. (2015). Interface pour la préparation rapide d'inversions et application à l'éruption du Piton de la Fournaise d'octobre 2010. Réunion du Service National des Observatoires Volcanologiques, Avril 2015, Paris.
    • Cayol V. (2015). Sill as a trigger for lateral flank displacements. Workshop Université Blaise Pascal - University of British Columbia, Simon Fraser University, Juin 2015.
    • Cayol V. (2015). Tracking intrusions from deformations with applications to Piton de la Fournaise and Nyiragongo. MEMOVOLC meeting, Anticipating volcanic eruptions, Feb. 2015, Pisa.
    • Cayol V., Cattelain C., Gouinaud C., Froger J.L. (2015). Interface for the joint inversion of sources geometries, locations and stress changes. Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.
    • Froger J.L., Cayol V., Grandin R., Villeneuve N., Peltier A., Rivet S., Ordoqui P., Mora O. (2015). Last eruptions of Piton de la Fournaise imaged with new generation radar data. Atelier ForM@Ter MDIS (Mesure de Déformations par Imagerie Spatiale), Autrans, Oct. 2015.
    • Kervyn F., d’Oreye N., Albino F., Derauw D., Cayol V., Arjon A., Nobile A. (2015). Ten years of InSAR in the Virunga: results and perspectives. Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.
    • Tridon M., Cayol V., Froger J.L. (2015). Modeling the eastern flank displacement of Piton de la Fournaise volcano (Réunion Island) observed by InSAR after the April 2007 eruption. Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.
    • Tridon M., Cayol V., Froger J.L., Augier A. (2015). Modelling the Eastern Flank displacement of Piton de la Fournaise volcano (Réunion Island) observed by InSAR after the April 2007 eruption. Atelier ForM@Ter MDIS (Mesure de Déformations par Imagerie Spatiale), Autrans, Oct. 2015.
    • Tridon M., Cayol V., Froger J.L., Bachèlery P. (2015). Modélisation du glissement du flanc Est du Piton de la Fournaise observé par InSAR après l'éruption d'avril 2007. Journée thématique sur l'île de la Réunion du Service National des Observatoires Volcanologiques, Paris, Avril 2015.
    • Wauthier C.D., Roman C.D., Poland M., Miklius A., Hooper A., Fukushima Y., Cayol V. (2015). Magma-Tectonic Processes in Kīlauea’s Upper Rift Zones Revealed by the Modeling of Geodetic and Volcano-Tectonic Seismic Datasets. Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.

    • Cayol V., Catry T., Michon L., Chaput M., Famin V., Bodart O., Froger J.L., Romagnoli C. (2014). Sheared sheet intrusions as mechanism for lateral flank displacement on basaltic volcanoes: Application to Réunion Island volcanoes. American Geophysical Union, San Francisco, U.S.A., décembre 2014.
    • Court S., Bodart O., Cayol V., Koko J. (2014). Fictitious domain methods for fracture models in elasticity. European Conference on Mathematics for Industry, Taormine, Italie. .
    • Court S., Bodart O., Cayol V., Koko J. (2014). Finite element methods for imposing jump boundary conditions with a fictitious domain approach. Congrès National d’Analyse Numérique, Carry-Le-Rouet. .
    • Court S., Cayol V., Bodart O., Koko J. (2014). Fictitious domain methods for fracture models in elasticity. Poster AGU San Francisco 2014.
    • Tridon M., Cayol V., Froger J.L. (2014). Modeling the eastern flank displacement of Piton de la Fournaise volcano (Réunion Island) observed by InSAR after the April 2007 eruption., Fringe 2015 workshop “Advances in the science and applications of SAR Interferometry and Sentinel-1 InSAR Workshop”, Frascati, Italie, Mars 2015.
    • Tridon M., Cayol V., Froger J.L., Augier A. (2014). Magma propagation and atypical eruptions at Piton de la Fournaise volcano (Réunion Island) : the april 2007 eruption. Nemoh school Inverse methods in geophysics and volcanology, Dublin, August 31 to September 5, 2014.
    • Wauthier C., Roman D., Poland M., Miklius A., Hooper A., Fukushima F., Cayol V. (2014). Deformation Sources in Kīlauea’s Southwest Rift Zone Inferred from the Modeling of Geodetic and Seismic Data. American Geophysical Union, San Francisco, U.S.A., décembre 2014.

    • Cayol V., Cattelain C., Gouinaud C., Hermite P., Froger J.L. (2013). An interface for the joint inversion of sources geometry and stress changes. in Atelier Form@ter Mesure de Déformations par Imagerie Spatiale, Autrans, Oct. .
    • Cayol V., Wauthier C., Kervyn F., D'oreye N. (2013). Magma assisted extension in an immature continental rift, based on InSAR observations of Nyamuragira and Nyiragongo Volcanoes. in Meeting on Active Volcanisme and Continental Rifting with special focus on the Kivu rift zone, Gisenyi, Rwanda, Nov. .
    • Wauthier C., Roman D., Poland M., Miklius A., Hooper A., Fukushima Y., Cayol V. (2013). Modeling the behavior of Kilauea’s southwest rift zone using InSAR, GPS, and seismic data. in Assemblée Générale de l'IAVCEI, Kagoshima, Japan, July. .
    • Wauthier C., Roman D.C., Poland M.P., Miklius A., Hooper A.J., Fukushima Y., Cayol V. (2013). Magma-tectonic interactions at Kilauea volcano revealed by the modeling of geodetic and seismic data. in American Geophysical Union, San Francisco, U.S.A., décembre. .

    • Cayol V., Augier A., Froger J.L., Souriot T. (2012). Improving the determination of volumetric sources from InSAR data. Colloque du CNFGG, Mesure et Modélisation en Volcanologie, Clermont-Ferrand, Oct. 2012. .
    • Cayol V., Froger J.L., Augier A., Fukushima Y., Bato M.G., Villeneuve N., Souriot T. (2012). Use of InSAR at Piton de la Fournaise. Undervolc Meeting, Paris, March 2012. .
    • Cayol V., Wauthier C., Kervyn F., D'Oreye N. (2012). Magma assisted extension in an immature continental tift, based on InSAR observations of Nyamuragira and Nyiragongo Volcanoes. AGU Chapman conference, Hawaiian volcanoes from source to surface, Waikoloa, Hawaii, USA, 20-24 August 2012. .
    • Froger J.L., Bato M.G., Souriot T., Villeneuve N., Durand P., Cayol V., Di Muro A., Staudacher T., Fruneau B. (2012). High-resolution interferometric monitoring of Piton de la Fournaise with Cosmo SkyMed Data. ESA Meeting, Agence Spaciale Italienne, Rome, March 2012. .
    • Froger J.L., Cayol V., Augier A., Bato M.G., Villeneuve N., Souriot T., Menassian S., Eschbach B., Durand P., Staudacher T., Di Muro A., Fruneau B., Rabaute T., Tinel C. (2012). Nine years of InSAR monitoring of Piton de la Fournaise: Results and Perspectives. AGU Chapman conference, Hawaiian volcanoes from source to surface, Waikoloa, Hawaii, USA, 20-24 August 2012. .
    • Wauthier C., Cayol V., Kervyn F., D'Oreye N. (2012). Magma Sources involved in the 2002 Nyiragongo Eruption,as inferred from an InSAR Analysis. AGU Chapman conference, Hawaiian volcanoes from source to surface, Waikoloa, Hawaii, USA, 20-24 August 2012. .
    • Wauthier C., Cayol V., Kervyn F., d’Oreye N. (2012). Nyiragongo Volcano Eruption, 2002, as Constrained by InSAR data. Magmatic Rifting and Active Volcanism Conference, Addis Ababa, Ethiopia 11-13 Janvier 2012. .
    • d’Oreye N., Albino F., Cayol V., Gonzalez P., Kervyn F., Samsonov S., Smets B., Wauthier C., Bagalwa L. M., Mashagiro N., Muhindo A., Syauswa M. (2012). Volcano monitoring in the Virunga Volcanic Province, DR Congo. Proc. GeoPRISMS East African Rift System (EARS), Morristown NJ, USA, 25 - 27 October 2012. .
    • d’Oreye N., Samsonov S., Cayol V., Wauthier C., Kervyn F. (2012). Two Decades of InSAR Observations in the Kivu Basin, Western Branch of East African Rift. Magmatic Rifting and Active Volcanism Conference, Addis Ababa, Ethiopia 11-13 Janvier 2012. .

    • Cayol V., Augier A., Froger J.L., Souriot T. (2011). Improving the determination of volumetric sources from InSAR data: Fringe2011 workshop “Advances in the science an applications of SAR Interferometry from ESA and 3rd party missions”, Frascati, Italie, 19-23 Septembre 2011. .
    • Cayol V., Wauthier C., Kervyn F., d’Oreye N. (2011). Magma driven extension in an immature continental rift based on InSAR observations of Nyiragongo Volcano in 2002: 96th Journées Luxembourgeoises de Géophysique, 24-25 novembre 2011. Invitée.
    • Froger J.L., Bato M.G., Villeneuve T., Souriot T., Rabaute T., Durand P., Cayol V., Di Muro A., Staudacher T., Fruneau B., Tinel C. (2011). High-Resolution Interferometric Monitoring of Piton de la Fournaise with TerraSAR-X and COSMO-SkyMed Data: Fringe, Rome, 19 Sep. - 23. .
    • Froger J.L., Villeneuve N., Souriot T., Rabaute T., Durand P., Cayol V., Di Muro A., Staudacher T., Fruneau B., Tinel C. (2011). High-Resolution Interferometric Monitoring of Piton de la Fournaise with TerraSAR-X Data. 4: TerraSAR-X Science Team Meeting 14-16 February 2011 at DLR Oberpfaffenhofen, Germany. .
    • Remy D., Froger J.L., Perfetini H., Cayol V. (2011). Joint inversion of INSAR and GPS time series: Application to the monitoring of ground motions related to volcanic and tectonic activity: Fringe2011 workshop “Advances in the science an applications of SAR Interferometry from ESA and 3rd party missions”, F.
    • Wauthier C., Cayol V., Kervyn F., d'Oreye N. (2011). Nyiragongo Volcano 2002 Eruption Constrained by Multibeam InSAR Data: European Geoscience Union General Assembly 2011, Vienna, Austria, 3-8 April 2011. .

    • Battaglia J., Roult G., Cayol V. (2010). Very Broad-Band seismicity related to the 2007 step-by-step collapse of the Dolomieu crater, Piton de la Fournaise Volcano (La Réunion Island). in workshop, Besse, France. .
    • Catry T., Cayol V., Famin V., Michon L., Romagnoli C., Chaput M. (2010). Dike and sill injections: what is the most likely trigger of volcano flank collapse. European Geophysical Union, Vienne, Autrice, Avril 2010. .
    • Cayol V., Augier A., Froger J.L. (2010). Apports de l'interférométrie radar à l'étude de l'éruption de mars-avril 2007 au Piton de la Fournaise. in Colloque autour de l'ANR EFIDIR, Aussois, 1-3 avril. .
    • Cayol V., Wauthier C., D'Oreye N., Kervyn F., the GVO Team (2010). InSAR displacements associated with the november 2006 and January 2010 Nyamuragira eruptions. Cities of Volcanoes, Tenerife (Canary Island, Spain), mai 2010. .
    • Froger J.L., Souriot T., Augier A., Cayol V., Byrdina S. (2010). VOLInSAR-PF, Service d’Observation InSAR multicapteurs sur le Piton de la Fournaise. Colloque « Les Satellites Grand Champ pour le suivi de l’environnement, des ressources naturelles et des risques », UBP-OPGC, Clermont-Ferrand, 21-22 janvier 2010. .
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