Using systematically characterized low-frequency earthquakes as a fault probe in Guerrero, Mexico - Archive ouverte HAL Access content directly
Journal Articles Journal of Geophysical Research : Solid Earth Year : 2014

Using systematically characterized low-frequency earthquakes as a fault probe in Guerrero, Mexico

(1) , (1) , , , , (2)
1
2

Abstract

Studies of low-frequency earthquakes (LFEs) have focused on detecting events within previously identified tectonic tremor. However, the principal LFE detection tools of matched-filter searches are intrinsically incapable of detecting events that have not already been characterized previously as a template event. In this study, we therefore focus on generating the largest number possible of LFE templates by uniformly applying a recently developed LFE template detection method to a 2.5 yearlong data set in Guerrero, Mexico. Using each of the detected templates in a matched-filter search, we then form event families that each represents a single source. We finally develop simple, empirical statistics to select the event families that represent LFEs. Our resulting catalog contains 1120 unique LFE sources and a total of 1,849,486 detected LFEs over the 2.5 yearlong data set. The locations of the LFE sources are then divided into subcatalogs based on their distance from the subduction trench. Considering each LFE as a small unit of slip along the subduction interface, we observe discrete episodes of LFE activity in the region associated with large slow-slip events; this is in direct contrast to the near-continuous activity observed 35 km farther downdip within the previously identified LFE/tremor sweet spot.
Fichier principal
Vignette du fichier
2014JB011457.pdf (10.39 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03581069 , version 1 (19-02-2022)

Licence

Copyright

Identifiers

Cite

William B. Frank, Nikolaï M. Shapiro, Allen L. Husker, Vladimir Kostoglodov, Alexey Romanenko, et al.. Using systematically characterized low-frequency earthquakes as a fault probe in Guerrero, Mexico. Journal of Geophysical Research : Solid Earth, 2014, 119, pp.7686-7700. ⟨10.1002/2014JB011457⟩. ⟨insu-03581069⟩
47 View
31 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More