M 7.2 - 32 km SSW of Pizarro, Colombia

  • 2004-11-15 09:06:56 (UTC)
  • 4.695°N 77.508°W
  • 15.0 km depth

Tectonic Summary

The November 15, 2004, M 7.2 earthquake near the west coast of Columbia occurred as the result of shallow thrust faulting at the northernmost end of the Peru-Chile Trench, on or near the plate boundary between the Nazca and South America plates. At the location of the earthquake, the Nazca plate subducts to the east relative to the South America plate at a velocity of about 59 mm/yr. The location, depth, and focal mechanism solutions of the earthquake are consistent with the event occurring on the thrust interface between the two plates. The M 7.2 earthquake of November 11, 1991, had a very similar location and focal mechanism solution to the November 15, 2004, event; the 1991 earthquake killed two people.

Hayes et al. (2016) Tectonic summaries of magnitude 7 and greater earthquakes from 2000 to 2015, USGS Open-File Report 2016-1192. (5.2 MB PDF)

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