Phreatic_St._Helens.jpg
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Description Phreatic St. Helens.jpg |
English:
Phreatic eruption at the summit of Mount St. Helens. Hundreds of these steam-driven explosive eruptions occurred as magma steadily rose into the cone and boiled groundwater. These phreatic eruptions preceded the volcano's plinian eruption in May 1980.
|
Date | Taken on 4 April 1980 |
Source | Archived source link |
Author | D.A. Swanson, United States Geological Survey |
Licensing
Public domain Public domain false false |
This image is in the
public domain
in the United States because it only contains materials that originally came from the
United States Geological Survey
, an agency of the
United States Department of the Interior
. For more information, see
the official USGS copyright policy
.
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Original upload log
Transferred from en.wikipedia to Commons by Kyro using CommonsHelper .
The original description page was
here
. All following user names refer to en.wikipedia.
- 2008-01-22 04:38 Axcordion 500×800× (89865 bytes) {{Information |Description=Phreatic eruption at the summit of Mount St. Helens. Hundreds of these steam-driven explosive eruptions occurred as magma steadily rose into the cone and boiled groundwater. These phreatic eruptions preceded the volcano's plini