Dome building eruption at Mount St. Helens—30-minute, moon-lit expo...

(Credit: Topinka, Lyn. Public domain.)

Detailed Description

The last dome-building eruption of Mount St. Helens during the 1980s occurred in October 1986. A new lobe was extruded, increasing the dome's height to 925 feet (282 meters), making it taller than a 77-story building. In volume, the dome was nearly 40 times the size of Seattle's Kingdome stadium. The view is from Harry's Ridge, five miles (8 kilometers) north of the volcano.

Details

Image Dimensions: 3072 x 2048

Date Taken: Wednesday, October 22, 1986