Abstract:
The Colima volcanic complex is the most prominent volcanic center of the western Trans-Mexican Volcanic Belt. It consists of two southward-younging volcanoes, Nevado de Colima (the 4,320-m-high point of the complex) on the north and the historically active Volcan de Colima at the south. A group of cinder cones of probable late-Pleistocene age is located on the floor of the Colima graben west and east of the Colima Complex. Volcan de Colima (also known as Volcan Fuego) is a youthful stratovolcano constructed within a 5-km-wide caldera, breached to the south, that has been the source of large debris avalanches. Slope failure has occurred repetitively from both the Nevado and Fuego cones, and has produced a thick apron of debris-avalanche deposits on three sides of the complex. Frequent historical eruptions from Colima's summit crater have produced vertical pyroclastic columns, pyroclastic flows, and lava flows.

From: Smithsonian Institution's Global Volcanism Network's Website

Latest Earthquakes in this region (last updated: 04. January 2006:17:29 MET):

From Swiss Seismological Service:

D a t e   Time (UTC)  Location  Dep Magni.         Region

14Dec2005 21:22:41.3 18.8N 100.9W115 MS=4.8 M*GSR GUERRERO, MEXICO 0120

Only events with an average magnitude larger/equal than 3 are listed.
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Other source: NEIC