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Transient fault slip in Guerrero, southern Mexico
Author(s) -
Lowry Anthony R.,
Larson Kristine M.,
Kostoglodov Vladimir,
Bilham Roger
Publication year - 2001
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013238
Subject(s) - seismology , geology , subduction , moment magnitude scale , slip (aerodynamics) , episodic tremor and slip , global positioning system , interplate earthquake , fault (geology) , slow earthquake , geodesy , tectonics , geometry , computer science , telecommunications , physics , mathematics , scaling , thermodynamics
The Guerrero region of southern Mexico has accumulated more than 5 m of relative plate motion since the last major earthquake. In early 1998, a continuous GPS site in Guerrero recorded a transient displacement. Modeling indicates that anomalous fault slip propagated from east to west along‐strike of the subduction megathrust. Campaign GPS and leveling data corroborate the model. The moment release was equivalent to an M w ≥6.5 earthquake. No M >5 earthquakes accompanied the event, indicating the frictional regime is velocity‐strengthening at the location of slip.