The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS

Details The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3413309l&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 13, CiteID L13309

Physics

21

Geodesy And Gravity: Transient Deformation (6924, 7230, 7240), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Geodesy And Gravity: Seismic Cycle Related Deformations (6924, 7209, 7223, 7230)

Scientific paper

Crustal deformation measurements from Guerrero, Mexico were made with continuous GPS instrumentation. This network spans 75 km along the coast and a 275 km transect from the coast to Mexico City, which is perpendicular to the Middle America trench. A large aseismic slip transient occurred from April to December 2006, yielding horizontal displacements of nearly 6 cm in the direction opposite to that recorded interseismically. This transient slip episode closely follows a series of ~M5 deep intraplate events that occurred in the northwestern portion of the Guerrero region. Both horizontal and vertical displacements are inverted for the Guerrero GPS network to determine slip along the subduction interface. Using a simple fault model that accommodates changes in the subduction zone geometry, it is found that slip is concentrated on interior fault patches, and propagated to the southeast. This slip event has a minimum equivalent Mw of 7.5.

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