Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, C.A. Neal, U.S. Geological Survey. |
Each eruption violently ejected large bombs along a narrow ballistic trajectory from the vent. This oblique view of the south flank of Crater Peak shows the fall-colored tundra and a covering of pyroclastic flow deposits dotted with numerous impact craters formed when these bombs slammed into the ground. These ballistic showers probably occurred during explosions of superheated water that gained access to the hot rock within the eruptive conduit below Crater Peak. Blocks 1 m across were thrown as much as 3 km from the vent. Image Credit: C.A. Neal. U.S. Geological Survey Photo Date: September 3, 1992 June 27, 1992 Mount Spurr USA volcano Following 39 years of inactivity, Crater Peak vent on the south flank of Mount Spurr volcano burst into eruption at 7:04 a.m. Alaska daylight time (ADT) on June 27, 1992. The Municipality of Anchorage reported nearly $2 million in damage, office closures, and cleanup costs from the August eruption. In addition, there were numerous, small-scale losses incurred by businesses. No loss of life resulted directly from the eruptions. However, two heart attacks, one fatal, from shoveling ashfall were reported in Anchorage. Event Data:
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