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The 'slow earthquakes' that we cannot feel may help protect against the devastating ones

How earthquake swarms arise

Geology Page - September 26, 2020

Seismogram

Superheated rocks deep underground help explain earthquake patterns

San Andreas Fault

Deep underground forces explain quakes on San Andreas Fault

Surface displacement mapped using InSAR satellite imaging data. Along the fault, the ground was either raised (southeast) or collapsed (northwest). The star designates the epicentre. Credit: Jean-François RITZ et al

The Le Teil earthquake provides new insights on seismic risk in France and Western Europe

seismogram

Machine learning unearths signature of slow-slip quake origins in seismic data

$The Romanche fracture zone$

Rare ‘boomerang’ earthquake observed along Atlantic Ocean fault line

Geology Page - August 16, 2020

$What factors influence the likelihood of fracking-related seismicity in Oklahoma?$

What factors influence the likelihood of fracking-related seismicity in Oklahoma?

Geology Page - July 25, 2020

268 seismometers (red) in 117 countries detected a drop on seismic noise. “Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures” by Thomas Lecocq et al., published Thursday 23 July 2020 in Science Credits:Photo of seismometer: Stephen Hicks/Imperial College London

COVID-19 lockdown caused 50 percent global reduction in human-linked Earth vibrations

Geology Page - July 25, 2020

False color satellite image of the Taimali catchment area in southeastern Taiwan in August 2009 after typhoon Morakot. Red: vegetated surface, grey: barren surface (Image: LANDSAT-7 / NASA, JPL).

Typhoon changed earthquake patterns

Geology Page - July 3, 2020

How water in the deep Earth triggers earthquakes and tsunamis

Geology Page - June 27, 2020

Illustration of the natural fluid injection process that triggered the Cahuilla swarm.

Natural fluid injections triggered Cahuilla earthquake swarm

Geology Page - June 27, 2020

Subduction zones occur where one tectonic plate dives under another. New computer modeling by Magali Billen, professor of earth and planetary sciences at UC Davis, shows why earthquakes on these sinking plates cluster at certain depths and could give insight into processes deep in the Earth. (U.S. Geological Survey)

New clues to deep earthquake mystery

Geology Page - May 28, 2020

New model to accurately date historic earthquakes

Geology Page - May 17, 2020

Fault

New study finds connection between fault roughness and the magnitude of...

Geology Page - April 25, 2020

The ash plume from the Kilauea volcano on the big island of Hawaii was pictured May 12, 2018, from the International Space Station. Credit: NASA

New NASA radar looks to monitor volcanoes and earthquakes from space

Geology Page - April 7, 2020

A seismogram of 2011 Tōhoku earthquake and tsunami recorded at Weston Observatory in Massachusetts, USA. Credit: Image from Wikimedia Commons.

Sediments may control location, magnitude of megaquakes

Geology Page - April 2, 2020

The grey line in the rock, running from the foreground away under the boulder towards the mountains, is one of the shear zones from the study area. Credit: Lucy Campbell

‘Fossil earthquakes’ offer new insight into seismic activity deep below Earth’s...

Geology Page - March 17, 2020

Japan's risk of giant tsunamis may have grown when the angle of a down-going slab of ocean crust declined. Top: ocean crust (right) slides under continental crust at a steep angle, causing faulting (red lines) in seafloor sediments piled up behind. Bottom: as the angle shallows, stress is transferred to sediments piled onto the continental crust, and faults develop there. Blue dots indicate resulting earthquakes. At left in both images, the change in angle also shifts the region where magma fueling volcanoes is generated, pushing eruptions further inland. Credit: Adapted from Oryan and Buck, Nature Geoscience 2020

Shifts in deep geologic structure may have magnified great 2011 Japan...

Geology Page - March 17, 2020

The SHIRE project, which contributed resources to this research, is investigating seamounts within the Hikurangi Trench, to learn how they generate or dampen earthquakes at different stages of subduction. This seismic image shows a seamount known as Puke Seamount, colliding with New Zealand. Image: SHIRE/Andrew Gase.

Sinking sea mountains make and muffle earthquakes

Geology Page - March 8, 2020

Research suggest that rocks colliding inside fault zones, like this one in Maine, may contribute to damaging high-frequency earthquake vibrations. Credit: Julia Carr

Researchers develop new explanation for destructive earthquake vibrations

Geology Page - March 8, 2020

Scientists used the model to calculate seismic risk in the L.A. Basin

Source of Indonesian earthquakes and tsunamis located

Geology Page - March 8, 2020

Core samples from the fault zone of the Japan Trench were recovered by the JFAST project and analyzed for evidence of past large earthquakes.

Seismic biomarkers in Japan Trench fault zone reveal history of large...

Geology Page - January 27, 2020

A map of Vancouver Island showing the locations of seismic instruments considered by the research group. The grey shaded region delineates where slow earthquakes occur.

Researchers find evidence to explain behavior of slow earthquakes

Geology Page - January 27, 2020

Fault zone with broken rock inside stippled lines and faulting directions of each rock segment outlined by half arrows. Photo credit: Henrik Drake. Illustration: Mikael Tillberg.

A new method for dating ancient earthquakes

Geology Page - January 20, 2020

seismogram

Magnitude of Great Lisbon Earthquake may have been lower than previous...

Geology Page - January 7, 2020

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Graphic showing the Transition Zone inside the Earth Princeton seismologist Jessica Irving worked with then-graduate student Wenbo Wu and another collaborator to determine the roughness at the top and bottom of the transition zone, a layer within the mantle, using scattered earthquake waves. They found that the top of the transition zone, a layer located 410 kilometers down, is mostly smooth, but the base of the transition zone, 660 km down, in some places is much rougher than the global surface average. “In other words, stronger topography than the Rocky Mountains or the Appalachians is present at the 660-km boundary,” said Wu. NOTE: This graphic is not to scale. Credit: Kyle McKernan, Office of Communications

Massive Bolivian earthquake reveals mountains 660 kilometers below our feet

February 16, 2019

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Huge ancient river basin explains location of the world’s fastest flowing...

New study shakes the roots of the dinosaur family tree

A fossilized trail of the animal Yilingia spiciformis, dating back 550 million years. The trail was found in China by a team of scientists including Shuhai Xiao of the Virginia Tech College of Science. Credit: Virginia Tech College of Science

Ancient animal species: Fossils dating back 550 million years among first...

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