A retrospective study of the pre-eruptive unrest on El Hierro (Canary Islands): implications of seismicity and deformation in the short-term volcanic hazard assessment

Stefania Bartolini, Carmen López, Laura Becerril, Rosa Sobradelo, Joan Martí
2017 NHESSD  
The correct identification and interpretation of unrest indicators are useful for forecasting volcanic eruptions, delivering early warnings, and understanding the changes occurring in a volcanic system prior to an eruption. Such indicators play an important role in upgrading previous long-term volcanic hazard assessments and help grasp the complexities of the preceding period of eruptive activity. In this work, we present a retrospective analysis of the 2011 unrest episode on the island of El
more » ... erro that preceded a submarine eruption. We use seismic and surface deformation monitoring data to compute the susceptibility analysis (QVAST tool) and to study the evolution over time of the unrest (ST-HASSET tool). Additionally, we show the advantages to be gained by using continuous monitoring data and hazard assessment e-tools to upgrade spatio-temporal analyses and thus visualize more simply the development of the volcanic activity.
doi:10.5194/nhess-2017-243 fatcat:34wwc53asfewvoul6f4qi3u3ee