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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
1997
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| Online Access: | https://www.redalyc.org/articulo.oa?id=56836301 |
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Table of Contents:
- The Victoria, Mexico, Earthquake of June 9, 1980 J. Frez V. Wong F. Suárez Ciencias de la Tierra Mexicali Valley earthquake effects Victoria Earthquake aftershock activity The Victoria earthquake of June 9, 1980 (ML = 6.1 ), occurred in the Mexicali Valley near the trace of theCerro Prieto fault with a focal mechanism consisting of a dextral strike-slip motion on a vertical fault. We presentresults from an analysis of local data concerning ground surface effects, epicenter locations, and focalmechanisms of the main shock and its aftershock activity. A field reconnaissance showed no clear ground surfacedisplacement related to the main shock. The aftershocks occurred northwest of the main shock epicenter, in a fewclusters at or near the northwest end of the Cerro Prieto fault. There was some aftershock activity north of theCerro Prieto fault tip and towards the southeast end of the Imperial fault. Only a few aftershocks were locatednear the main shock; they occurred during the first few hours after the main event. The aftershock activity wasmainly located between 3 and 8 km in depth, beneath the thick overlying sediments. The average depth of theaftershocks generally decreases to the northwest, away from the main epicenter which is at a depth of about 9 km. Composite focal mechanisms of the aftershocks show a right-lateral strike-slip motion on a vertical plane strikingN45°W for the cluster near the main shock epicenter, and normal faulting for the cluster at the northwest end ofthe Cerro Prieto fault. Two small tightly clustered earthquake swarms occurred a few hours before the mainshock. 1997 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56836301 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.3 Vol.36