Séminaire Constanza Bonadonna – Physical Characterization and Tephra Sedimentation of Long-Lasting Hybrid Eruptions: the 2021 Tajogaite Eruption of Cumbre Vieja (La Palma, Canary Islands)

The 2021 hybrid Tajogaite eruption of Cumbre Vieja (La Palma, Spain) was mainly effusive, with >70% of volume erupted as lava and simultaneous explosive activity with variable eruptive styles depositing a widespread tephra blanket. Statistical analyses of pulsatory activity indicate short-time fluctuations amongst the observed multiple eruptive styles, suggesting rapid gas segregation and high magma ascent rate modulating magma fragmentation and conduit dynamics distributed at the different vents. Evidence of the Tajogaite eruption dynamics highlight the challenges of risk and crisis management associated with long-lasting basaltic pulsatory hybrid eruptions.