Why earthquake doublets in the Ometepec, Guerrero, Mexico subduction area?

Details Why earthquake doublets in the Ometepec, Guerrero, Mexico subduction area? Why earthquake doublets in the Ometepec, Guerrero, Mexico subduction area?

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pepi..132..131y&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 132, Issue 1-3, p. 131-139.

Physics

Scientific paper

We have studied the aftershock sequence following the major earthquakes of 7 June 1982 that occurred in the Ometepec, Guerrero in southern Mexico, a region of high seismic potential. Earthquakes in this region frequently occur in pairs (called earthquake doublets in seismology). Earthquake doublet appearance in other regions has been related to the presence of large isolated asperities, that is, zones of high stress concentration on the fault plane. In the present paper, we propose a new relationship between Ometepec, Guerrero doublet generation and local geological features. The spatial distribution of the aftershocks suggests the presence of a Cocos subducting plate disruption at the Ometepec, Guerrero area which may be causally related to the doublet genesis.

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