Global Volcanism Program | Image GVP-03812
Prior to the major 1982 eruption, El Chichón volcano, viewed here from the SW in 1981, contained a large summit lava dome (upper right) and a lower flank dome (center) inside two overlapping craters. A white steam plume rises from a fumarole along a fault cutting the left side of the larger dome. The last major eruption of El Chichón prior to 1982 occurred about 500 years ago, but residents reported an eruption about 130 years ago, witnessed by their grandparents, that was strong enough to prompt an evacuation.
Photo by René Canul, 1981 (Comisión Federal de Electricidad).