Long-period and volcano-tectonic earthquakes record cycles of opening and closing in the enhanced seismic catalog of the 2008 Okmok Volcano, Alaska, eruption

Garza‐Girón, Ricardo; Brodsky, E. E.; Spica, Zack; Webley, P. W.

doi:10.22541/essoar.168167180.08760979/v1

Cited by 1 publication

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“…specifics related to the eruptive sequence such as the spatiotemporal patterns of seismicity (VTs and LPs), is shown by Garza-Giron et al (2023). Nonetheless, the newly relocated pre-eruptive, co-eruptive, and immediately post-eruptive seismicity at Okmok Volcano brings new information about the structures and processes that could have been involved in the beginning, development, and cessation of the eruption.…”

Section: Discussionmentioning

confidence: 99%

“…The newly relocated pre-eruptive, co-eruptive, and immediately post-eruptive seismicity at Okmok Volcano brings new information about the structures and processes that could have been involved in the beginning, development, and cessation of the 2008 eruption. We briefly note the major spatial features here and refer the reader to Garza-Giron et al (2023) for the fuller analysis of the catalog in its volcanological context. If we consider the broad seismicity of Okmok Volcano during the eruption (Figure 6), we can see certain features that are present in both the locations and relocations.…”

Section: Relocationsmentioning

confidence: 99%

“…We note the relative performance of the detection algorithms and illustrate their combined power by showing that each method can capture some detections that are missed by others. The interpretation of this catalog is related to the volcanological context and significance as presented by Garza-Giron et al (2023).…”

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confidence: 99%

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A Specific Earthquake Processing Workflow for Studying Long‐Lived, Explosive Volcanic Eruptions With Application to the 2008 Okmok Volcano, Alaska, Eruption

et al. 2023

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The rupture of rocks, as manifested by earthquakes, is an intrinsic part of volcanic eruptions. The seismic waves of earthquakes are the most readily observable aspect of rock failure and fluid flow during large scale eruptions. Seismicity is one of the most common precursors of eruptions and it often continues after an eruption ends. But what happens in between? How do the earthquakes progress during an eruption? These questions have been studied at length for effusive eruptions, but have been hampered by detection limits during sustained, large-scale explosive eruptions. Explosive eruptions are generally characterized by high-noise seismic wavefields produced by strong seismic tremor, explosions, collapses, and many other sources of seismic excitation, causing the surviving, on-scale seismograms in the near-field (<20 km) to be covered with continuous waves that obscure the signals of individual earthquakes, particularly the low magnitude ones.Our goal is to create a high-resolution earthquake catalog in near-field (i.e., high-noise environment) records during an extended explosive eruption to better understand co-eruptive earthquake dynamics. To accomplish this, we developed a specific seismic processing workflow that detects, associates, locates, relocates, computes local magnitudes, and finally classifies events in a binary way: volcano-tectonic earthquakes (VTs) or long-period

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Section: Discussionmentioning

confidence: 99%

Section: Relocationsmentioning

confidence: 99%