Título

The silent earthquake of 2002 in the Guerrero seismic gap, Mexico (Mw=7.6): inversion of slip on the plate interface and some implications

Autor

Arturo Iglesias

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

GPS - ([http://bcct.unam.mx/ftpbcct/GI-Iglesias2004.pdf]) BRECHA SÍSMICA DE GUERRERO - ([http://bcct.unam.mx/ftpbcct/GI-Iglesias2004.pdf]) TERREMOTOS - ([http://bcct.unam.mx/ftpbcct/GI-Iglesias2004.pdf]) North America - (LCC) GUERRERO SEISMIC GAP - (LCC) GPS - (LCC) Earthquake - (LCC) concept8601 - (UNESCO) Seismology - (GEOREF) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) CIENCIAS DE LA TIERRA Y DEL ESPACIO - (CTI) GEOFÍSICA - (CTI) SISMOLOGÍA Y PROSPECCIÓN SÍSMICA - (CTI)

Resumen o descripción

We invert GPS position data to map the slip on the plate interface during an aseismic, slow-slip event, which occurred in 2002 in the Guerrero seismic gap of the Mexican subduction zone, lasted for ∼4 months, and was detected by 7 continuous GPS receivers located over an area of ∼550×250 km2. Our best model, under physically reasonable constraints, shows that the slow slip occurred on the transition zone at a distance range of 100 to 170 km from the trench. The average slip was about 22.5 cm (Mo∼2.97 ×1027 dyne-cm, Mw=7.6). This model implies an increased shear stress at the bottom of the locked, seismogenic part of the interface which lies updip from the transition zone, and, hence. an enhanced seismic hazard. The results from other similar subduction zones also favor this model. However, we cannot rule out an alternative model that requires slow slip to invade the seismogenic zone as well. A definitive answer to this critical issue would require more GPS stations and long-term monitoring.

Editor

UNAM, Instituto de Geofísica

Fecha de publicación

17 de marzo de 2004 15 de marzo de 2003

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://rigeofisica.ssn.unam.mx/jspui/handle/ssnmx/46

Iglesias, A.; S. K. Singh; A. R. Lowry; M. Santoyo; V. Kostoglodov; K. M. Larson and S. I. Franco-Sánchez. 2004. "The Silent Earthquake of 2002 in the Guerrero Seismic Gap, Mexico (Mw=7.6): Inversion of Slip on the Plate Interface and Some Implications." Geofisica Internacional, 43(3), 309-317. http://bcct.unam.mx/ftpbcct/GI-Iglesias2004.pdf

Formato

pdf

Fuente

http://bcct.unam.mx/ftpbcct/GI-Iglesias2004.pdf

Idioma

Inglés

Relación

Geofísica Internacional

0016-7169

Repositorio Orígen

Repositorio de Literatura del Servicio Sismológico Nacional

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