Gas and steam emit from fumaroles on the sulfur-encrusted crater wall of Popocatépetl seen here in 1993, prior to the eruptive activity that began in December 1994. The east floor of the crater contained a smaller circular crater about 200 m in diameter and 50 m deep. A small lake about 40 m in diameter and 10 m deep, which varied in size seasonally, contained warm water (29°C) in 1986. By February 1994 the lake temperature had risen to 65°C.

Photo by Hugo Delgado-Granados, 1993 (Universidad Nacional Autónoma de México).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Geothermal Features | Volcanic Gases

Keywords: crater | mineral deposit | sulfur | crater lake | emissions | gas | geothermal | fumarole

Popocatépetl