Imagen:St Helens May 18, 1980 showing ash column.jpg
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St_Helens_May_18,_1980_showing_ash_column.jpg (543 × 353 píxeles; tamaño de archivo: 37 KB; tipo MIME: image/jpeg)
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[edit] Description
For more than nine hours a vigorous plume of ash erupted, eventually reaching 12 to 15 miles (20-25 kilometers) above sea level. The plume moved eastward at an average speed of 60 miles per hour (95 kilometers/hour), with ash reaching Idaho by noon. By early May 19, the devastating eruption was over. Shown here is a close-up view of the May 18 ash plume. (May 18, 1980, by Donald A. Swanson, USGS) USGS image from [1]
[edit] Summary
| Description |
Mount St. Helens Ash plume /column |
|---|---|
| Source |
http://vulcan.wr.usgs.gov/Volcanoes/MSH/SlideSet/ljt_slideset_old.html |
| Date | |
| Author |
U.S. government |
| Permission |
PD |
| Other versions | none |
[edit] Licensing
 |
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