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Were changes in stress state responsible for the 2019 Ridgecrest, California, earthquakes?

Earth Sciences

Were changes in stress state responsible for the 2019 Ridgecrest, California, earthquakes?

K. Z. Nanjo

Explore the intriguing findings from the study on the 2019 Ridgecrest earthquake sequence conducted by K. Z. Nanjo. Discover how stress changes can influence seismic activity, revealing potential risks for future earthquakes in California.

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Playback language: English
Abstract
The 2019 Ridgecrest earthquake sequence in California involved a M6.4 and a subsequent M7.1 quake. This study investigates whether changes in stress state were responsible, using a statistical approach based on the b-value of the Gutenberg-Richter law. The results show that the rupture initiation for both quakes occurred in areas of low b-values (indicative of high stress) before the events. A post-M7.1 analysis reveals a new low-b-value zone near the Garlock fault, suggesting a high likelihood of further seismicity.
Publisher
Nature Communications
Published On
Jun 17, 2020
Authors
K. Z. Nanjo
Tags
Ridgecrest earthquake
b-value
stress state
seismicity
Gutenberg-Richter law

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