Some aspects of the seismicity associated with the 1982 eruption of El Chichon Volcano, Chiapas, Mexico
Por:
Espíndola J.M., Zamora-Camacho A., Jiménez Z.
Publicada:
1 ene 2006
Resumen:
We review the different phases of the seismicity related to the 1982 eruption of El Chichon Volcano, Chiapas, Mexico. The pre-eruption seismicity was already anomalous by late 1980, became significant by late 1981 and increased towards 28 March, 1982, when the first eruptive event occurred. A noticeable feature within the 7-day period of unrest is the occurrence of three earthquake swarms before the devastating explosions of 3 and 4 April 1982 (local time). The periodicity and appearance of the swarms, close to the time of maximum tidal strain, suggests a large overpressure in the magmatic system, and the triggering of the events by the earth tides. The post-eruption seismicity occurred mostly in a radius 5 km from the crater and a depth range 11 to 15 km suggesting that this region was a deeper reservoir of the erupted magma. © 2006 Elsevier B.V. All rights reserved.
Filiaciones:
Espíndola J.M.:
Instituto de Geofísíca, Universidad Nacional Autónoma de México, Av. Universidad 3000, Col. Copilco, Mexico 04510 D.F., Mexico
Zamora-Camacho A.:
Instituto de Geofísíca, Universidad Nacional Autónoma de México, Av. Universidad 3000, Col. Copilco, Mexico 04510 D.F., Mexico
Jiménez Z.:
Instituto de Geofísíca, Universidad Nacional Autónoma de México, Av. Universidad 3000, Col. Copilco, Mexico 04510 D.F., Mexico
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