Caption: "On 1980 May 18 at 8:32 am Pacific Daylight Time, a magnitude 5.1 earthquake shook volcano Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a major pumice and ash volcanic eruption. Thirteen-hundred feet (400 meters) of the peak collapsed or blew outwards. As a result, 24 square miles (62 square kilometer) of valley was filled by a debris avalanche, 250 square miles (650 square kilometer) of recreation, timber, and private lands were damaged by a lateral blast, and an estimated 200 million cubic yards (150 million cubic meters) of material was deposited directly by lahars (volcanic mudflows) into the river channels. Sixty-one people were killed or are still missing due to the Mount St. Helens eruption 1980 USGS photograph taken on 1980 May 18 by Austin Post (1922--2012)." (Somewhat edited.)
Double-click for the high resolution image.
On Earth, there's a good volcanic eruption very few years. Notable volcanic eruptions:
- Mount Vesuvius 79 CE, Pompeii, Italy.
- Mount Tambora eruption 1815, Indonesia.
- Krakatoa eruption of 1883, Indonesia.
- Mount St. Helens eruption 1980, United States of America. See the image.
- Mount Pinatubo eruption 1991, Philippines.
- Soufriere Hills eruption 1995--1999, Montserrat.
- Eyjafjallajoekull eruption of 2010, Iceland.
- New Reykjanes Fires (2020--): An ongoing series of volcanic eruptions on the Reykjanes Peninsula, Iceland. The series might go on for decades or centuries.
See Volcano videos below (local link / general link: volcano_videos.html):
Credit/Permission:
US Geological Survey (USGS),
Austin Post (1922--2012),
1980 /
Public domain.
See USGS Copyright Policy.EOF
Image link: Wikipedia:
File:MSH80 eruption mount st helens 05-18-80.jpg.
Local file: local link: volcano_mt_st_helens.html.
File: Earth file:
volcano_shield_cartoon.html.html.