Deformation in the Guerrero seismic gap, Mexico, from leveling observations |
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| Authors: | V Kostoglodov R W Valenzuela A Gorbatov J Mimiaga S I Franco J A Alvarado R Peláez |
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| Institution: | Instituto de Geofísica, UNAM, C?udad Universitaria, Del. Coyoacan, 04510 México, D.F., México e-mail: vladimir@ollin.igeofcu.unam.mx; Tel.: +525 622 4138; Fax: +525 616 2547, XX
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| Abstract: | The Pacific coast of Guerrero state in Mexico is recognized as the `Guerrero seismic gap', with a high probability of producing
a large subduction earthquake (M > 8). A study of the vertical surface deformation was undertaken to understand the interseismic process of elastic strain
accumulation. Four leveling lines were installed in the states of Guerrero and Michoacán. Starting in 1995, several high-accuracy
leveling surveys have been carried out on those profiles once every year. The vertical uplift rate across the Guerrero coastal
region, as determined through the changes in repeated leveling surveys, suggests the accumulation of elastic strain at both
ends of the gap. In contrast, the sense of tilting in the middle of the gap is opposite to that observed at the ends and suggests
significant changes in the geometry of the locked zone and perhaps even slow strain release.
Received: 24 February 2000 / Accepted: 23 August 2000 |
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| Keywords: | : Interseismic uplift Leveling Guerrero gap Subduction zone Mexico |
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