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Infrasound generated by the 2016-2017 shallow submarine eruption of Bogoslof volcano, Alaska

January 31, 2020

The 2016–2017 shallow submarine eruption of Bogoslof volcano produced numerous infrasound signals over 9 months that were recorded on six Alaska Volcano Observatory (AVO) arrays at ranges of 59 to over 800 km from the volcano. The lack of geophysical monitoring near Bogoslof and the repeated production of volcanic clouds to flight levels made monitoring by remote infrasound critical during the eruption; for the first time, AVO relied extensively on automated infrasound detections from regional arrays to dispatch timely notifications of the ongoing activity. Most of the 70 eruptive events were detected on at least one array, but no array detected all of the events mainly because atmospheric conditions were highly variable during the eruption. Acoustic propagation modeling helps explain some of the variation in array detections but also highlights limitations in regional propagation models. To our knowledge, this is the first example of well-recorded infrasound from an explosive eruption occurring in shallow seawater, providing extensive insights into eruption dynamics in this unique environment. The dominance of low-frequency infrasound (0.1–1 Hz) is attributed to eruptions occurring beneath tens of meters of seawater. Higher-frequency infrasound signals were mostly limited to eruptions where the vent was isolated from major interaction with seawater or in several cases where a lava dome grew above sea level.

Citation Information

Publication Year 2020
Title Infrasound generated by the 2016-2017 shallow submarine eruption of Bogoslof volcano, Alaska
DOI 10.1007/s00445-019-1355-0
Authors John J. Lyons, Alexandra M. Iezzi, David Fee, Hans Schwaiger, Aaron Wech, Matthew M. Haney
Publication Type Article
Publication Subtype Journal Article
Series Title Bulletin of Volcanology
Index ID 70218239
Record Source USGS Publications Warehouse
USGS Organization Volcano Science Center