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Global Volcanism Program | Image GVP-00987

The 1991 eruption of Pinatubo began on 2 April with a small phreatic eruption on the upper NW flank.  The eruptions formed several craters along a 1.5-km-long, E-W-trending alignment. Steam rises from a vent at the SW end of the fissure.  Activity continued at two of these vents through April-May and increased prior to extrusion of a small lava dome at a NW-flank vent on 7 June. Photo by Chris Newhall,1991 (U.S. Geological Survey).

The 1991 eruption of Pinatubo began on 2 April with a small phreatic eruption on the upper NW flank. The eruptions formed several craters along a 1.5-km-long, E-W-trending alignment. Steam rises from a vent at the SW end of the fissure. Activity continued at two of these vents through April-May and increased prior to extrusion of a small lava dome at a NW-flank vent on 7 June.

Photo by Chris Newhall,1991 (U.S. Geological Survey).

Keywords: crater | phreatic | ash | volcanic gas | vent | explosive | ash | plume | eruption


Pinatubo