El Chichón

El Chichón, also known as El Chichonal (roughly translated in English as "The bump") is an active volcano in Francisco León Municipality in northwestern Chiapas, Mexico. Its only recorded eruptive activity was on March 29, April 3 and April 4, 1982 , when it produced a one km-wide caldera that then filled with an acidic crater lake. The eruption killed around 2,000 people who lived near the volcano. It had high-sulfur anhydrite-bearing magma, explosive eruptions, pyroclastic flows, and surges that were devastating. In 2000, the lake's water temperature increased. Also, the lake acquired a blue-green color, due to massive amounts of dissolved minerals in the acidic water, and fine, light-colored ashy sediment continually stirred up by...