HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Low-frequency earthquakes in the Mexican Sweet Spot

Abstract : We use data from the Meso-America Subduction Experiment to detect and locate low-frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually-identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct families. Stacking an LFE family's corresponding detections results in seismograms with high signal-to-noise ratios and clear P and S wave arrivals; we use these travel times to locate the sources. The resulting locations superpose a previously identified region of permanent non-volcanic tremor (NVT) activity. Husker et al. (2012) called this region a Sweet Spot, suggesting that the local conditions are adequate to continuously generate NVT. The LFE hypocenters have been located at a depth of 40-45 km in an area that is surrounding the upper slab-plate interface. We characterize their focal mechanisms by comparing their stacked seismograms to synthetic seismograms. This analysis reveals a common low-dipping focal mechanism.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03581787
Contributor : Nathalie Pothier Connect in order to contact the contributor
Submitted on : Monday, February 21, 2022 - 4:32:35 PM
Last modification on : Tuesday, February 22, 2022 - 3:37:40 AM

File

Geophysical Research Letters -...
Publisher files allowed on an open archive

Licence


Copyright

Identifiers

Citation

William B. Frank, Nikolaï M. Shapiro, Vladimir Kostoglodov, Allen L. Husker, Michel Campillo, et al.. Low-frequency earthquakes in the Mexican Sweet Spot. Geophysical Research Letters, American Geophysical Union, 2013, 40, pp.2661-2666. ⟨10.1002/grl.50561⟩. ⟨insu-03581787⟩

Share

Metrics

Record views

21

Files downloads

3