June 2006 seismic swarm and dike injection event beneath the Michoacan-Guanajuato volcanic field

Details June 2006 seismic swarm and dike injection event beneath the Michoacan-Guanajuato volcanic field June 2006 seismic swarm and dike injection event beneath the Michoacan-Guanajuato volcanic field

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.v51d2071c&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #V51D-2071

Physics

8414 Eruption Mechanisms And Flow Emplacement, 8415 Intra-Plate Processes (1033, 3615), 8434 Magma Migration And Fragmentation, 9350 North America

Scientific paper

A seismic swarm of approximately 700 events, magnitude 2.5-3.5, occurred in June of 2006 approximately 15 km from the summit of the cinder cone Paricutin, in the Michoacan-Guanajuato Volcanic Field in central Mexico. The swarm was detected and located as part of an effort to develop a catalog of regional seismicity using stations fortuitously in place as part of two concurrent IRIS/PASSCAL supported projects- the Mapping of the Rivera Subduction Zone (MARS) project run by the University of Texas at Austin and New Mexico State University, and the Colima Volcano Deep Seismic Experiment (CODEX), run by the University of Alaska Fairbanks. Over a two-week period in June 2006, relocated hypocenters clearly show a shallowing trend with time, indicative of a possible dike injection event. The rate of injection appears to be 346 m/day. Following the injection, there is a period of earthquakes, which all occurred at approximately 5 km in depth, but which migrated southwards. The waveforms of all of these events show similarities within three major groupings: from May 28 to June 1, June 2 to June 9 (which marks the end of the ascent), and from June 9 to July 2.

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