Active Tectonics

Thursday, September 7, 2017

M 8.0 - west central Mexico coast offshore Chiapas

A great earthquake has occurred off of the west coast of Mexico offshore of Chiapas. It is tsunamigenic. It looked to be along the subduction interface, but the focal mechanism and depth suggest normal faulting in the slab below. See seismicity map for more commentary about normal faults and this cross section.
I am accumulating some links here. Check back for more.


From USGS

Recording at ASU

IRIS Teachable Moment materials for this earthquake

Links:

  • USGS main page on the event
  • USGS finite fault model
  • IRIS back projection model
  • US tsunami warning system--apparently no imminent tsunami danger for western US
  • European-Mediterranean Seismological Centre page on the event
  • GeoScope page on the event--has nice source time function
  • Bravo, et al., 2004 paper on Tehuantepec portion of Mexican subduction zone.
  • Nice map and tweet from Steven Hicks
  • Nice interpretations from EarthJay
  • Mountain Beltway blog explainer
  • Temblor blog explainer
  • Webcam de Mexico shows 2 minutes early warning
  • KQED news report
  • Cool comparison of earthquake and hurricane seismograms

Posted by J Ramón Arrowsmith at 10:29 PM
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Labels: Earthquakes, USGS
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J Ramón Arrowsmith
Geology Professor in the School of Earth and Space Exploration at Arizona State University
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