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Global Volcanism Program | Image GVP-01159

Hydrothermally altered rocks are exposed in the NW crater wall of Kawah Ijen in 1973. Rafts of yellow floating sulfur line the shore of the turquoise-colored crater lake. The walls of the 1.2-km-wide crater rise to more than 200 m above the surface of the lake, which has a maximum depth of 200 m. Photo by Sumarma Hamidi, 1973 (Volcanological Survey of Indonesia).

Hydrothermally altered rocks are exposed in the NW crater wall of Kawah Ijen in 1973. Rafts of yellow floating sulfur line the shore of the turquoise-colored crater lake. The walls of the 1.2-km-wide crater rise to more than 200 m above the surface of the lake, which has a maximum depth of 200 m.

Photo by Sumarma Hamidi, 1973 (Volcanological Survey of Indonesia).

Keywords: crater | crater lake | sulfur | gas | emissions


Ijen