GSLC SESI 21 Louis Beverly

Beverly, Louis

doi:10.31219/osf.io/cdwsz

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Major Eruption Of Steamboat Geyser1

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2024

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“…On 18 September, an observer in the vicinity of Norris Geyser Basin heard the eruption begin at 15:10 and reported an initial water phase duration of ~10 min (Beverly 2022). We determine the volume of the water discharge pulse [Figure 2D] from the eruption by manually picking the start and end times, interpolating baseflow, and subtracting baseflow volume from the total volume.…”

Section: Major Eruption Of Steamboat Geysermentioning

confidence: 99%

A shake and a surge: Assessing the possibility of an earthquake-triggered eruption at Steamboat Geyser

Reed,

Barth,

Taira

et al. 2024

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When and why earthquakes trigger the eruption of magma, mud, and water remain unclear. On 18 September 2022, Steamboat Geyser in Yellowstone, USA erupted 8.25 hours after a local M3.9 earthquake. The distribution of Steamboat eruption intervals suggests a low probability of erupting so soon after the earthquake by chance. A seismometer 340 m from Steamboat recorded seismic waves with a peak ground velocity of 1.2 cm/s, which is the largest ground motion experienced in the area since at least March 2018 and is similar to values that have affected other Yellowstone geysers. Ambient seismic noise amplitude and relative seismic velocity changes in narrow frequency bands indicate a subsurface hydrothermal response. We find it likely that the eruption was earthquake-triggered. If so, the hours-long delay suggests that dynamic strains from seismic waves caused changes in subsurface permeability and flow paths that enabled eruption.

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Section: Major Eruption Of Steamboat Geysermentioning

confidence: 99%