Image:St Helens April 27, 1980 showing bulge.jpg

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A "bulge" developed on the north side of Mount St. Helens as magma pushed up within the peak. Angle and slope-distance measurements to the bulge indicated it was growing at a rate of up to five feet (1.5 meters) per day. By May 17, part of the volcano's north side had been pushed upwards and outwards over 450 feet (135 meters). The view is from the northeast. (April 27, 1980, by Peter W. Lipman, USGS)

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This image is a work of a United States Geological Survey employee, taken or made during the course of the person's official duties. As a work of the United States Government, the image is in the public domain. For more information, see the USGS copyright policy.

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  • (del) (cur) 02:10, 23 May 2004 . . Maveric149 ( Talk | contribs) . . 543×353 (41,324 bytes) ( USGS image from [http://vulcan.wr.usgs.gov/Volcanoes/MSH/SlideSet/ljt_slideset_old.html]<br><br>{{msg:PD}})
  • (del) (rev) 02:10, 23 May 2004 . . Maveric149 ( Talk | contribs) . . 543×353 (41,324 bytes) ( USGS image from [http://vulcan.wr.usgs.gov/Volcanoes/MSH/SlideSet/ljt_slideset_old.html]<br><br>{{msg:PD}})

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