The October 9,1995 Colima-Jalisco, Mexico earthquake (Mw 8): An aftershock study and a comparison of this earthquake with those of 1932
Por:
Pacheco J., Singh S.K., Domínguez J., Hurtado A., Quintanar L., Jiménez Z., Yamamoto J., Gutiérrez C., Santoyo M., Bandy W., Guzmán M., Kostoglodov V., Reyes G., Ramírez C.
Publicada:
1 ene 1997
Resumen:
Data from portable seismographs and a permanent local network (called RESCO) are used to locate the aftershocks of the October 9, 1995 Colima-Jalisco earthquake (Mw 8.0). The maximum dimension of the aftershock area, which is rectangular in shape, is 170 km × 70 km. Our study shows that the mainshock nucleated ? 24 km south of Manzanillo, near the foreshock of October 6, 1995 (Mw 5.8), and propagated ?130 km to the NW and ?40 km to SE. The aftershock area lies offshore and is oriented parallel to the coast. The observed subsidence of the coast is a consequence of this offshore rupture area. The aftershocks reach unusually close to the trench (within 20 km). This may be due to lack of sediments with high pore pressure at shallow depth. There are some similarities between this earthquake and the two great earthquakes of 1932 (3 June, Ms 8.1; 18 June, Ms 7.8) which occurred in this region. In both cases the aftershocks were located offshore and the coastline subsided. The sum of seismic moments and the rupture lengths of the 1932 events (1.8×1021 N-m and 280 km, respectively), however, were greater than the 1995 earthquake. Also a comparison of seismograms of 1932 and 1995 earthquakes show great differences. It seems that the 1995 event is not a repeat of either June 3 or June 18, 1932 earthquakes. Copyright 1997 by the American Geophysical Union.
Filiaciones:
Pacheco J.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Singh S.K.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Domínguez J.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Hurtado A.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Quintanar L.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Jiménez Z.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Yamamoto J.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Gutiérrez C.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
CENAPRED, México, D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Santoyo M.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Bandy W.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Guzmán M.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Kostoglodov V.:
Instituto de Geoffísica, UNAM, Mexico D.F., Mexico
Instituto de Geofísica, Univ. Nac. Auton. de México, C.U., 04510 México, D.F., Mexico
Reyes G.:
Red Sismologica del Estado de Colima, Universidad de Colima, Colima, Mexico
Ramírez C.:
Red Sismologica del Estado de Colima, Universidad de Colima, Colima, Mexico
All Open Access; Bronze
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