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Global Volcanism Program | Image GVP-08276

The area affected by a December 8, 1994 phreatic explosion is visible from the NW rim of Irazú's summit crater.  The explosion originated from a fumarolic area (lower right) on the upper NW flank and produced ashfall to about 30 km from the vent, destroying forests down to 2500 m elevation.  The explosion, which produced no juvenile material, created an irregular crater 60-80 m in diameter.  Landslides and lahars traveled down the Río Sucio drainage (right center). Photo by Lee Siebert, 1998 (Smithsonian Institution).

The area affected by a December 8, 1994 phreatic explosion is visible from the NW rim of Irazú's summit crater. The explosion originated from a fumarolic area (lower right) on the upper NW flank and produced ashfall to about 30 km from the vent, destroying forests down to 2500 m elevation. The explosion, which produced no juvenile material, created an irregular crater 60-80 m in diameter. Landslides and lahars traveled down the Río Sucio drainage (right center).

Photo by Lee Siebert, 1998 (Smithsonian Institution).


Irazú