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Shallow slow earthquakes to decipher future catastrophic earthquakes in the Guerrero seismic gap

Earth Sciences

Shallow slow earthquakes to decipher future catastrophic earthquakes in the Guerrero seismic gap

R. Plata-martinez, S. Ide, et al.

Discover the intriguing findings from a team of researchers including R. Plata-Martinez, S. Ide, and M. Shinohara, who investigated the Guerrero seismic gap. Their study unveils episodic tremors and stable slip on the shallow plate interface, shedding light on the enigmatic long return period of large earthquakes in this critical region.

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Playback language: English
Abstract
The Guerrero seismic gap, a major source of seismic and tsunami hazard along the Mexican subduction zone, has been studied using newly deployed instruments to better characterize the extent of the seismogenic zone. This research reports the discovery of episodic shallow tremors and potential slow slip events offshore Guerrero. Their distribution, alongside repeating earthquakes, seismicity, residual gravity, and bathymetry, suggests stable slip on a portion of the shallow plate interface. This might explain the gap's long return period of large earthquakes and why past ruptures haven't propagated into it. However, dynamic rupture effects from nearby earthquakes could break through the entire Guerrero seismic gap.
Publisher
Nature Communications
Published On
Jun 28, 2021
Authors
R. Plata-Martinez, S. Ide, M. Shinohara, E. S. Garcia, N. Mizuno, L. A. Dominguez, T. Taira, Y. Yamashita, A. Toh, T. Yamada, J. Real, A. Husker, V. M. Cruz-Atienza, Y. Ito
Tags
Guerrero seismic gap
seismic hazard
tsunami hazard
shallow tremors
slow slip events
earthquake
dynamic rupture
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