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X-WR-CALDESC:Évènements pour Laboratoire Magmas et Volcans
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DTSTART;VALUE=DATE:20170502
DTEND;VALUE=DATE:20170601
DTSTAMP:20260506T183827
CREATED:20170505T115126Z
LAST-MODIFIED:20170505T115208Z
UID:12844-1493683200-1496275199@lmv.uca.fr
SUMMARY:A. Bouvier et T. Whiters au LMV
DESCRIPTION:Tony Whiters (professeur invité UBP) et Audrey Bouvier (invitée ERC) sont arrivés au laboratoire cette semaine et vont rester tout le mois de mai.Ils viennent de University of Western Ontario (London\, Canada).\n\n\nVoici leurs pages web pour plus d’infos:\nhttps://www.uwo.ca/earth/people/faculty/withers.html\nhttps://www.uwo.ca/earth/people/faculty/bouvier.html
URL:https://lmv.uca.fr/agenda/audrey-bouvier-et-tony-whiters-au-lmv/
ATTACH;FMTTYPE=image/jpeg:https://lmv.uca.fr/wp-content/uploads/2017/05/b_1_q_0_p_0.jpg
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DTSTART;TZID=Europe/Paris:20170517T140000
DTEND;TZID=Europe/Paris:20170517T150000
DTSTAMP:20260506T183827
CREATED:20170516T073506Z
LAST-MODIFIED:20170517T133229Z
UID:12887-1495029600-1495033200@lmv.uca.fr
SUMMARY:Séminaire de Vyacheslav M. Zobin
DESCRIPTION:Mercredi 17 Mai à 14h dans la salle des séminaires (1.10) : \nVyacheslav M. Zobin\,  Centro Universitario de Estudios Vulcanológicos\, Universidad de Colima\, Colima\, México  \nTitle: Seismic signals of rockfalls as indicators of the origin of lava fragments emplaced during the 2010 endogenous and exogenous growth in the crater of Volcán de Colima\, México  \n  \n \n  \nAbstract  \nThe 2010-2011 exogenous emplacement of lava lobe during the 2007-2011 lava dome growth at andesitic Volcán de Colima\, México interrupted the previous endogenous regime and allowed us to obtain the seismic signals associated with rockfalls triggered by both exogenous and endogenous growth. We analyzed a total of 410 seismic signals of rockfalls with durations from 50 to 150 s recorded during January-April 2010. Two characteristic populations of seismic signal peak frequencies were identified: a low frequency (LF) group (mean = 1.76±0.44 Hz) and a high frequency (HF) group (mean = 3.13±0.63 Hz)\, associated respectively with rockfalls caused by endogenous and exogenous growth in the crater. Application of the Kolmogorov-Smirnov test showed at 0.01 significance level that the databases of LF and HF seismic signals of rockfalls belong to different samples and may be considered as having the different origin. The results show that the spectral properties of the seismic signals produced by rockfalls may serve as indicators of the origin of falling lava fragments and thus can be used to monitor effusive volcanic activity.
URL:https://lmv.uca.fr/agenda/seminaire-de-vyacheslav-m-zobin/
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