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Global Volcanism Program | Image GVP-11560

Hydrothermally altered rocks and lava flows are prominent in cliffs on the upper northern flank of Irazú volcano.  Las Fumaroles (upper left-center), a thermal area below the north-flank cliffs, was the source of an explosive eruption in December 1994 that also produced an avalanche and mudflow down the Río Sucio. Photo by Eliecer Duarte, 2001 (OVSICORI-UNA).

Hydrothermally altered rocks and lava flows are prominent in cliffs on the upper northern flank of Irazú volcano. Las Fumaroles (upper left-center), a thermal area below the north-flank cliffs, was the source of an explosive eruption in December 1994 that also produced an avalanche and mudflow down the Río Sucio.

Photo by Eliecer Duarte, 2001 (OVSICORI-UNA).


Irazú