Poster of the Colima, Mexico Earthquake of 22 January 2003 - Magnitude 7.6
This shallow earthquake occurred in a seismically active zone near the coast of central Mexico. The earthquake occurred near the junction of three tectonic plates: the North American Plate to the north-west, the Rivera Plate to the north-east, and the Cocos Plate to the south. Both the Rivera Plate and the Cocos Plate are being consumed beneath the North American Plate in a north-west direction. The slower moving Rivera Plate is moving north-west at about 2 cm per year relative to the North American Plate and the faster moving Cocos plate is moving in a similar direction at a rate of about 4.5 cm per year.
There have been several significant earthquakes near the recent event. In 1932 a magnitude 8.4 thrust earthquake struck about 100 km to the north-west. More recently, on October 9th 1995, a large earthquake struck about 20 km to the north-west. This magnitude 8.0 shock on October 9th killed at least 49 people and left 1,000 homeless. The most deadly earthquake in the region occurred about 170 km to the south-east on September 19,1985. This magnitude 8.0 earthquake killed at least 9,500 people, injured about 30,000, and left 100,000 people homeless.
The posters may be downloaded for viewing or for printing on a color plotter. Adobe PDF (.pdf) format files are provided. Adobe Acrobat 6.0 or higher is required for viewing the PDF file on a computer monitor and for printing the PDF map graphic.
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