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ASTER


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Mount St. Helens, Washington
Mt. St. Helens 1980
Mt. St. Helens 2019
Mount St. Helens, Washington, erupted 40 years ago, on May 18, 1980. A massive debris avalanche, triggered by an earthquake of magnitude 5.1, caused a lateral eruption that reduced the elevation of the mountain's summit from 2,950 m to 2,549 m, leaving a 1.6 km wide horseshoe-shaped crater. The collapse of the northern flank resulted in massive volcanic mudflows. Since 1980, new lava built a dome in the crater, and occasional steam and ash plumes have been emitted. The Landsat MSS image was acquired July 31, 1980, and the ASTER image on July 28, 2019. The images cover an area of 30 by 30 km, and are located at 46.2 degrees north, 122.2 degrees west.

Click on thumbnails below for full resolution images.

Mt. St. Helens 1980 Mt. St. Helens 1980
Type: (JPG)
Size: (538,600 bytes)
Resolution ( 2,000 x 2,000 )
Mt. St. Helens 2019 Mt. St. Helens 2019
Type: (JPG)
Size: (888,046 bytes)
Resolution ( 2,000 x 2,000 )

Please give credit for these images to:
NASA/METI/AIST/Japan Space Systems,
and U.S./Japan ASTER Science Team

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FIRST GOV
CL 97-1376
700 hits since 09/15/06.
Added: 5/18/2020 9:39:21 AM
NASA Home Page Questions? Comments? Contact:
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