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Earthquake source observations

Series of six figures showing recovered fault geometry and slip models, from early to late stages in the inversion procedure.
Posted inEditors' Highlights

New Inversion Method Improves Earthquake Source Imaging

by C. Lasserre 30 August 202128 September 2021

A new method uses Bayesian inference to jointly invert for non-planar fault geometry and spatially variable slip (with associated uncertainties) in earthquake source modeling, based on geodetic data.

Sketch showing induced seismicity on critically stressed faults as a consequence of changes in pore pressure and related changes in stress due to anthropogenic activities
Posted inEditors' Vox

Understanding and Anticipating Induced Seismicity

by B. Müller, M.-L. Doan, T. H. Goebel, Y. Liu, P. Martínez-Garzón, T. Mitchell and I. Zaliapin 30 July 202128 September 2021

A new special collection in JGR: Solid Earth and Earth and Space Science seeks papers from across disciplines that provide insights into induced seismicity at different spatial and temporal scales.

Diagram of megathrust earthquakes resulting from different material contrast scenarios
Posted inEditors' Highlights

The Highs and the Lows of Megathrust Earthquakes

by T. Parsons 21 July 202128 September 2021

Why does low-frequency energy come from the shallow part of ruptures, and the high frequencies from deep?

Two maps of the Japanese islands showing distribution of volcanoes (top) and areas of large crustal earthquakes analyzed in this study (bottom).
Posted inEditors' Highlights

The First Systematic Search for Enervated Earthquakes

by S. Ide 11 May 202128 September 2021

High quality data from Japan provides answers on where and when “enervated” earthquakes occur.

Imaging seismic sources with waveforms ranging from the laboratory scale to the global scale
Posted inEditors' Vox

Imaging Seismic Sources

by L. Li and B. Schwarz 30 April 2020

Waveform‐based location methods are being used to better characterize and understand seismic sources from the laboratory to the global scale.

Satellite image of the Strait of Juan de Fuca
Posted inNews

Fluid Pressure Changes Grease Cascadia’s Slow Aseismic Earthquakes

by Mary Caperton Morton 18 February 2020

Twenty-five years’ worth of data allows scientists to suss out subtle signals deep in subduction zones.

Damaged buildings with a Puerto Rican flag in the foreground
Posted inNews

Enjambre de Terremotos Inusuales Golpean a Puerto Rico

by Kimberly M. S. Cartier 27 January 202030 March 2020

Puerto Rico no había visto tantos sismos fuertes en una sola secuencia desde que comenzó el monitoreo sísmico hace 46 años. El último terremoto que dañó la isla gravemente ocurrió en 1918.

Damaged buildings with a Puerto Rican flag in the foreground
Posted inNews

Rare Earthquake Swarm Strikes Puerto Rico

by Kimberly M. S. Cartier 9 January 202028 September 2021

Puerto Rico hasn’t seen this many strong quakes in a single sequence since seismic monitoring began 46 years ago. The last earthquake to damage the island this badly occurred in 1918.

Black-and-white photo of a rubble-filled city street and a queue of people filing out
Posted inNews

Finding Faults in Our Past: Uncovering the Messina Earthquake

by Sarah Derouin 19 December 2019

The source of the deadly 1908 Italian earthquake may finally be identified, thanks to a fresh look at the geomorphology of the Strait of Messina.

Smartphones lay on a shake table to record accelerometer data.
Posted inNews

How to Turn Your Smartphone into an Earthquake Detector

by Jenessa Duncombe 8 December 20199 December 2019

A free smartphone app tracks earthquakes using your phone’s accelerometer. One day, the app could issue emergency warnings to those in danger.

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