Monday, May 23, 2022
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The Kumano Pluton in southern Japan appears as a red bulge (indicating dense rock) in the center of a new 3D visualization by The University of Texas at Austin. The pluton is large enough to interfere with the nearby Nankai subduction zone and the region’s earthquakes. Credit: Adrien Arnulf
Earthquake

Big data imaging shows rock’s big role in channeling earthquakes in...

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A magnitude 8.2 earthquake was “hidden” within a magnitude 7.5 earthquake in 2021, sending a mysterious tsunami around the world, according to a new study in Geophysical Research Letters. Credit: Zhe Jia and AGU
Earthquake

Hidden magnitude-8.2 earthquake source of mysterious 2021 global tsunami

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A series of earthquakes and aftershocks shook the Ridgecrest area in Southern California in 2019. Distributed acoustic sensing (DAS) using fiber-optic cables enables high-resolution subsurface imaging, which can explain the observed site amplification of earthquake shaking. Credit: Yang et al., 2022
Earthquake

Fiber-optic cables can produce high-resolution underground maps

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On September 29, 2009, a tsunami caused substantial damage and loss of life in American Samoa, Samoa, and Tonga. The tsunami was generated by a large earthquake in the Southern Pacific Ocean. Credit: NOAA
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Earthquake depth impacts potential tsunami threat

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Stick-slip events in the earth cause damage like this, but limited data from these relatively rare earthquakes makes them difficult to model with machine learning. Transfer learning may provide a path to understanding when such deep faults slip. Credit: Dreamstime
Earthquake

Using sparse data to predict lab earthquakes

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A ruptured fault in Searles Valley, California, after the 2019 Ridgecrest earthquakes. A study of earthquakes led by The University of Texas at Austin found that seismic shockwaves are shaped by jagged faults and the debris wedged between them. Credit: Ben Brooks/USGS
Earthquake

Seismic shockwave pattern may be redirecting earthquake damage

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Jessica Pilarczyk (SFU) and collaborator Tina Dura (Virginia Tech) sample sediment cores from rice paddies of the Greater Tokyo Region that contain evidence for an earthquake from 1,000 years ago that potentially originated from a historically unconsidered earthquake source. Credit: SFU
Earthquake

Researchers identify new source for earthquakes and tsunamis in the Greater...

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In the time between mega-earthquakes, smaller earthquakes continuously occur between oceanic and continental plates (background earthquakes). Where a lot of energy is released through these earthquakes, we observe coastal mountains that rise faster. In contrast, slow-uplifting coastal areas coincide with fewer background earthquakes. Credit: University of Tübingen
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Continuous activity of small earthquakes makes mountains grow

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Chunks of exotic green rocks from the mantle erupted from the San Carlos Volcanic Field, Arizona. Credit: James St John
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Rock crystals from the deep give microscopic clues to earthquake ground...

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Researchers also want to encourage the locals to develop practical evacuation plans to help them feel less pessimistic about their survival odds. Credit: Katsushika Hokusai
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Previously unrecognized tsunami hazard identified in coastal cities

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Seismogram
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Earthquake, tsunami hazards from subduction zones might be higher than current...

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Fracking
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Local impacts from fracking the Eagle Ford

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Experimental setup for 3D seismic model.
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3D printed models provide clearer understanding of ground motion

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Seismogram
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Study reveals the workings of nature’s own earthquake blocker

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Glaciers such as the Yakutat in Southeast Alaska, shown here, have been melting since the end of the Little Ice Age, influencing earthquakes in the region. Credit: Sam Herreid
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Melting glaciers contribute to Alaska earthquakes

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The Cinders lava flow Utah
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Unusual earthquakes highlight central Utah volcanoes

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Using a method to better locate the source of weak tremors from regions with complex geological features, researchers found that many tremors originate from the shear zone, an area of high fluid pressure, in the Nankai Trough, which is schematically shown here with structures of tectonic plates and fault lines.
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Making sense of commotion under the ocean to locate tremors near...

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Matthew Siegfried inspects a GPS device, powered by a solar panel at Whillans Ice Plain. Credit: Grace Barcheck/Cornell University
Earthquake

Slow motion precursors give earthquakes the fast slip

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Map of the Cascadia subduction zone. Credit: Public Domain
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Deep, slow-slip action may direct largest earthquakes and their tsunamis

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Overview of the study area and the schematic illustration of interaction of fault motion and the seafloor subsidence. Credit: University of Tsukuba
Earthquake

New model reveals previously unrecognized complexity of oceanic earthquake zones

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