The geodetic signature of the M8.0 Oct. 9, 1995, Jalisco subduction earthquake
Abstract
The October, 1995 Mw 8.0 Jalisco subduction earthquake has provided a thorough geodetic observation of the coseismic subduction process. An 11 station regional GPS network located directly onshore of the rupture demonstrates consistent vertical subsidence verified by tide gauge data and southwest-directed extension, with measured displacements reaching 1 meter. Unusually shallow and non-uniform faulting is required to explain the displacements. We determine that up to 5 meters of slip occurred within the upper 15 km of the thrust fault zone and 2 meters possibly as shallow as 8 km, and that slip was likely distributed in two main patches. The paucity of continental sediments in this subduction zone could be responsible for the anomalously shallow faulting.
Additional Information
© 1997 American Geophysical Union. Manuscript Accepted: 14 Jan 1997. Manuscript Received: 4 Oct 1996. Paper number 97GL0037. The data were collected with the indispensable help of Dawnika Blatter, Phillip Bonstin, Jaime Dominguez, and Gerardo Perez-Ramos. The data were inverted using GINV and DISL programs written by Shawn Larsen. We thank the GIPSY-OASIS development team at JPL for GPS data-processing help. Supported by NSF grant EAR-9527810. California Institute of Technology Seismological Laboratory contribution #5795.Attached Files
Published - grl9999.pdf
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Additional details
- Eprint ID
- 44933
- Resolver ID
- CaltechAUTHORS:20140414-135006071
- NSF
- EAR-9527810
- Created
-
2014-04-14Created from EPrint's datestamp field
- Updated
-
2022-11-08Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory, Division of Geological and Planetary Sciences
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 5795