Disruption of Long-Term Effusive-Explosive Activity at Santiaguito, Guatemala
MetadataShow full item record
Volcano-seismologyEruption chronologyVolcanic explosionsMultiparametric monitoringThermal infra-red imaging
Lamb OD, Lamur A, Díaz-Moreno A, De Angelis S, Hornby AJ, von Aulock FW, Kendrick JE, Wallace PA, Gottschämmer E, Rietbrock A, Alvarez I, Chigna G and Lavallée Y (2019) Disruption of Long-Term Effusive-Explosive Activity at Santiaguito, Guatemala. Front. Earth Sci. 6:253.
SponsorshipYL, OL, AL, AH, FvA, PW, and JK acknowledge support from the European Research Council Starting Grant on Strain Localisation in Magma (SLiM, 306488). SD, AR, and YL thank the Natural Environment Research Council (NERC) for an urgency grant on Rapid deployment of a multiparameter geophysical experiment at Santiaguito volcano, Guatemala, following a marked increase in explosive activity (NE/P007708/1) and the Liverpool Earth Observatory for financially supporting the undertaking of this long-term, large-scale, multi-parametric investigation. AD-M was partially funded by NERC grant NE/P00105X/1 and the Spanish Mineco Project KNOWAVES (TEC2015-68752). IA was supported by Spanish research grant MECD Jose Castillejo CAS17/00154.
Rapid transitions in eruptive activity during lava dome eruptions pose significant challenges for monitoring and hazard assessment. A comprehensive understanding of the dynamic evolution of active lava dome systems requires extensive sets of multi-parametric datasets to fully constrain and understand shifts in eruptive behavior, but few such datasets have been compiled. The Santiaguito lava dome complex, Guatemala, is a remarkable example of an open-vent volcanic system where continuous eruptive activity has typically been characterized by cycles of effusion and frequent, small to moderate, gas-and-ash explosions. During 2015–2016 the volcano experienced a rapid intensification of activity including large vulcanian explosions, frequently accompanied by pyroclastic density currents. Here we present a chronology of the eruptive activity at Santiaguito from November 2014–May 2017, compiled from field observations (visual and thermal) and activity reports. We also present seismic and acoustic infrasound data collected during the same period, the longest and largest dataset collected at Santiaguito to date. Three major phases of eruptive activity took place during the study period.