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Articles by Aaron Wech
Rupture continuity through intermittent pauses in Cascadia slow slip events
Links More information: Publisher Index Page (via DOI) Download citation as: RIS | Dublin Core Study Area Publication type Article Publication Subtype Journal Article Title Rupture continuity through intermittent pauses in Cascadia slow slip events Series title Journal of Geophysical Research: Solid Earth DOI 10.1029/2025JB031501 Volume 130 Issue 8 Publication Date August 07, 2025 Year Published 2025 Language English Publisher American Geophysical Union Contributing office(s) Volcano Science...
Seismic techniques and suggested instrumentation to monitor volcanoes
First posted October 4, 2024 Changes in the pressure or location of magma can stress or break surrounding rocks and trigger flow of nearby waters and gases, causing seismic signals, such as discrete earthquakes and tremor. These phenomena are types of seismic unrest that commonly precede eruption and can be used to forecast volcanic activity.
Volcano Watch: Deep Repeating Earthquakes Beneath Maunakea
Example 2-hours of seismic data from the station near Maunakea on April 14, 2020. The large spikes are earthquakes under Mauna Kea repeating every 11 minutes. The bottom waveform zooms in on 15 seconds of an individual event. Mauna Kea volcano hasn’t erupted in over 4,500 years, but that doesn’t mean it’s quiet. In fact, for decades it has been hiding one of the most unique seismic signals seen at any volcano. Some discoveries are just serendipity.
Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano
Report View ORCID ProfileAaron G. Wech1,*, View ORCID ProfileWeston A. Thelen2, View ORCID ProfileAmanda M. Thomas3 1U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, USA. 2U.S. Geological Survey, Cascades Volcano Observatory, Vancouver, WA, USA. 3Department of Earth Sciences, University of Oregon, Eugene, OR, USA. ↵*Corresponding author. Email: awech{at}usgs.gov See allHide authors and affiliations Science 15 May 2020: Vol. 368, Issue 6492, pp.
Deep long-period earthquakes generated by second boiling beneath Mauna Kea volcano
Report Aaron G. Wech1,*, Weston A. Thelen2, Amanda M. Thomas3 1U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, AK, USA. 2U.S. Geological Survey, Cascades Volcano Observatory, Vancouver, WA, USA. 3Department of Earth Sciences, University of Oregon, Eugene, OR, USA. ↵*Corresponding author. Email: awech{at}usgs.gov See allHide authors and affiliations Science 15 May 2020: Vol. 368, Issue 6492, pp.
Seismo-acoustic evidence for vent drying during shallow submarine eruptions at Bogoslof volcano, Alaska
Abstract Characterizing the state of the volcanic vent is key for interpreting observational datasets and accurately assessing volcanic hazards. This is particularly true for remote, complex eruptions such as the 2016–2017 Bogoslof volcano, Alaska eruption sequence. Bogoslof’s eruptions in this period were either shallow submarine or subaerial, or some combination of both.
Infrasound from giant bubbles during explosive submarine eruptions
Abstract Shallow submarine volcanoes pose unique scientific and monitoring challenges. The interaction between water and magma can create violent explosions just below the surface, but the inaccessibility of submerged volcanoes means they are typically not instrumented. This both increases the risk to marine and aviation traffic and leaves the underlying eruption physics poorly understood.
Cascadia subduction tremor muted by crustal faults
Research Article|June 01, 2017
Realtime Tremor
This higher-rate, lower-accuracy version of PNSN's standard tremor product updates hourly, but is known to contain significantly more false detections ( awech@usgs.gov
Temporal Variation of Tectonic Tremor Activity in Southern Taiwan Around the 2010 ML6.4 Jiashian Earthquake
Deep tectonic tremor, which is extremely sensitive to small stress variations, could be used to monitor fault-zone processes during large earthquake cycles and aseismic processes before large earthquakes.
Pacific Northwest Seismic Network
SoundersFC Soccer Shake November 8, 2019 This “SoundersFC Soccer Shake” experiment is part of our routine training for rapid instrument installation and urban seismology and is being run with permission from the Seattle Sounders Football Club.
Cascadia subduction tremor muted by crustal faults
Deep, episodic slow slip on the Cascadia subduction megathrust of western North America is accompanied by low-frequency tremor in a zone of high fluid pressure between 30 and 40 km depth. Tremor density (tremor epicenters per square kilometer) varies along strike, and lower tremor density statistically correlates with upper plate faults that accommodate northward motion and rotation of forearc blocks. Upper plate earthquakes occur to 35 km depth beneath the faults.
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