Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, K. Jackson, U.S. Air Force. |
The first major eruption of Pinatubo on June 12, 1991; view to the west from Clark Air Base. Pyroclastic flows (clouds of ash and steam) advanced 5-15 km down the north, northwest, and southwest flanks of the volcano. Most of the remaining personnel at Clark Air Base were evacuated along with thousands of people at nearby Angeles City. However, personnel returned to Clark Air Base within a few hours of the start of this first eruption, as winds had blown the volcanic ash south of the base. Image Credit: K. Jackson. U.S. Air Force 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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