Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, R.P. Hoblitt, U.S. Geological Survey. |
Aerial view on June 22 of the northeast side of Pinatubo showing valley-filling pyroclastic deposits from the June 15 eruption. Thick pyroclastic-flow deposits (locally more than 200 m) occurred in main valleys at distances of 12-18 km from the caldera, and caused surface-drainage diversions. These flows were accompanied by ash clouds whose deposits ranged in thickness from a few to tens of centimeters. Image Credit: R.P. Hoblitt. U.S. Geological Survey June 15, 1991 Pinatubo Philippines volcano Mount Pinatubo is an andesitic island arc volcano, located on the southwestern part of the island of Luzon in the Philippines. Prior to 1991, it had been dormant for more than 635 years. After months of rumbling, the volcano stirred to life on April 2, 1991. The next two and a half months were marked by generally increasing volcanic and seismic activity at the site. On June 15, a cataclysmic eruption began with a tremendous explosion. This slide set shows the early stages of the eruption phase, the cataclysmic eruption of June 15, and the effects and aftermath of the eruption. Subsequent calamities caused by the ash, pyroclastic flows, mud flows, and flooding are also depicted. Event Data:
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