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Drilling deep for clues on earthquakes

New computer modeling approach could improve understanding of megathrust earthquakes

Map of the locations and depths of the deep low-frequency (DLF) earthquakes beneath the Laacher See Volcano ("Lake Laach Volcano") in Germany. Brittle earthquakes are marked as circles, DLF events as stars. Credit: Hensch et al.

Deep low-frequency earthquakes indicate migration of magmatic fluids beneath Laacher See...

A snapshot of seismic data taken at a single station during the peak of an aftershock sequence

Q&A: Creating a “Virtual Seismologist”

Transportable Array station P19K is one of the closest stations to the Iniskin earthquake origin. Solar panels power the station, and the seismometer is buried in a specially drilled borehole to insulate it from surface noise. Photo taken in 2017 during a service site visit by Incorporated Research Institutions for Seismology (IRIS). IRIS manages the Transportable Array station installation and maintenance. Credit: Doug Bloomquist, IRIS

Alaska earthquakes offer new insight into improving hazard assessment

Angelenos play below derricks at Huntington Beach pier, c. 1930-40. In the early decades of the twentieth century, LA residents accepted ground subsidence and small earthquakes as the cost of producing oil. But discontent began to rumble in the late 1930s. Rapid exploitation of Wilmington, one of the largest oil fields in California, and the Huntington Beach field caused Long Beach harbor to sink, buckling railway lines and forcing the city to build higher piers. Credit: Orange County Archives

Oil extraction likely triggered mid-century earthquakes in L.A.

Christopher DuRoss of the USGS updates maps of the trench walls while sitting on one of the benches excavated across the sackungen. Flags on the wall denote different layers of sediment the team identified that moved during past earthquake events. Credit: Ryan Gold.

Punctuated earthquakes for New Madrid area: New research uncovers cluster of...

Ed Garrett of Durham University examines bleached coralline algae related to the the 2016 magnitude 7.6 Chiloé earthquake in Chile. Credit: Martin Brader

White line of algae deaths marks uplift in 2016 Chilean earthquake

This is an aerial view of hydraulic fracturing operations across the Jonah field, a large natural gas field in Wyoming.

Where water goes after fracking is tied to earthquake risk

Illustration of the North Anatolian fault zone

Micro-earthquakes preceding a 4.2 earthquake near Istanbul as early warning signs?

Rice University scientists studied how the density of microseismicity, or small tremors, related to the seismic structure of the Pacific Northwest in the United States. Red lines in the graphic at left correspond to cross-sections from northern Washington (top), central Oregon (middle), and northern California (bottom).

Relationship between tremors, water at the Cascadia margin

Mexico’s 2017 Tehuantepec quake suggests a new worry

Seismogram

Quiescent British Columbia fault capable of producing large earthquakes

Huge earthquake simulator getting upgrade to better simulate deadly temblors

Kaikoura earthquake research suggests new approach to earthquake forecasting

Seismogram

New approach offers high-resolution seismic monitoring of the shallow subsurface

This image shows widely-felt earthquakes that struck north-central Oklahoma and southern Kansas

Researchers map susceptibility to human-made earthquakes

Seismic analysis identifies 2017 North Korean nuclear explosion, collapse, earthquakes

Regional seismic data help to locate September 2017 North Korean nuclear...

Radium from within rock leaches from clay minerals that transfer highly radioactive radium-228 and an organic phase that serves as the source of radium-226.

How slick water and black shale in fracking combine to produce...

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