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faults

Figure from the paper.
Posted inEditors' Highlights

Low-Frequency Quakes Have Modest Effect on Slow Earthquake Cycle

by Marcos Moreno 5 September 202331 August 2023

Slow slip phenomena on subdaily scales, captured by seismic and GNSS data, show that low-frequency earthquakes are incidental to larger magnitude slow earthquakes, in which aseismic slip dominates.

View overlooking part of Acapulco, Mexico, in the foreground with Acapulco Bay beyond
Posted inResearch Spotlights

Talc May Make Mexico’s Subduction Zone More Slippery

Aaron Sidder, freelance science writer by Aaron Sidder 23 August 202323 August 2023

Production of the weak, water-bearing mineral at the interface between the Cocos and North American Plates could contribute to the occurrence of poorly understood episodic tremor and slow slip.

Photo taken from a helicopter of a broken road in a desert landscape
Posted inNews

Global Earthquake Analysis Seeks Elusive Foreshock Signal

by Nathaniel Scharping 15 August 202315 August 2023

Spotting foreshocks for what they are could help seismologists forecast large earthquakes.

Diagram from the paper.
Posted inEditors' Highlights

A New Workflow to Image the 3D Structure of Active Faults

by Patricia Martínez-Garzón 22 June 202322 June 2023

A new approach to illuminate 3D fault structures using earthquake hypocenters may improve our understanding of earthquake propagation and arrest across step overs.

Diagram from the paper.
Posted inEditors' Highlights

Are Low-Frequency Earthquakes Just Slow Slip?

by Marcos Moreno 5 June 202331 May 2023

Tests of seismic attenuation show fluid saturation and high pressure near a seismic source reduce high-frequency content, challenging the idea of slow slip as the cause of low-frequency earthquakes.

A tan and brown striped rock surface with a fault running through the middle
Posted inResearch Spotlights

Rougher Faults May Generate More Earthquake Aftershocks

Sarah Stanley, Science Writer by Sarah Stanley 1 May 20231 May 2023

Lab experiments on pieces of granite reflect natural aftershock dynamics and highlight the role of rock roughness along a fault.

Graphs from the paper.
Posted inEditors' Highlights

Bayesian Inversion Used to Recover Geometry of Ruptured Fault

by Elisa Tinti 21 April 202319 April 2023

A new Bayesian inversion framework is used to solve non-planar geometry of a ruptured fault from spatially variable slip and rake measured with geodesy.

A metal cylinder and box surrounded by dry grass in front of a house in a rural area.
Posted inNews

The Western Great Basin Has an Arsenic Problem—Blame Its Geology

by Elise Cutts 31 March 2023

A new study links geological factors such as faulting and geothermal activity to an elevated risk of arsenic contamination in private wells across the Great Basin.

Map of study area
Posted inEditors' Highlights

Radar Satellites Capture Subtle Slip Evolution on Faults

by Cécile Lasserre 30 March 202327 March 2023

A five-year time series from radar satellite imagery tracks surface slip on major faults in the San Francisco Bay Area, capturing subtle velocity variations and controlling factors.

Several people sit and stand around a large map of the seafloor on a table in laboratory space.
Posted inScience Updates

Observing a Seismic Cycle at Sea

by Margaret Boettcher, Emily Roland, Jessica Warren, Robert Evans and John Collins 7 March 202325 May 2023

Scientists organized a trio of expeditions to document the buildup of stress leading to a large earthquake on a seafloor fault, developing innovations for successful seagoing research in the process.

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