Colima, Active volcano in Jalisco, Mexico
Colima is a volcanic complex in Jalisco, Mexico, containing two stratovolcanoes, with the younger fire peak rising to 3,850 meters (12,600 feet) above sea level. The summit is often wrapped in ash clouds, and the slopes carry traces of past lava flows spreading across the forested lower sections.
The volcano experienced its most powerful explosive eruption in January 1913, producing wide ash flows and forming a 300-meter (980-foot) deep summit crater. Further major outbursts occurred through the 20th century, reshaping the peak several times through collapse and regrowth.
The local observatory carries a name rooted in the colonial era, when settlers named the area after the word for hill. Scientists there work daily with equipment that records seismic movements and helps residents of surrounding villages understand warning signals.
The area is accessible to hikers in good physical condition, but authorities restrict access during periods of heightened activity to ensure safety. Visitors should check current conditions beforehand and note that exclusion zones may expand depending on volcanic behavior.
The peak holds high amounts of andesite, a volcanic rock with silica content between 56 and 61 percent, which shapes the surrounding landscape. This composition leads to thicker lava than in other volcano types, often favoring explosive outbursts.
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