Mount St. Helens Erupts Again: Activity from September 2004 through March 2005

-- Major, J.J., Scott, W.E., Driedger, C., and Dzurisin, D., 2005, Mount St. Helens Erupts Again; Activity from September 2004 through March 2005: U.S. Geological Survey Fact Sheet 2005-3036, 4 p.

After 18 years of relative quiescence, Mount St. Helens volcano recaptured the world’s attention when it showed signs of reawakening in September 2004. On September 23 a swarm of small (less than magnitude (M) 0), shallow (less than 1.5 miles below the surface) earthquakes began in and beneath the 1980-1986 lava dome. -- Major et.al., 2005

In HTML Format
- Fact Sheet -- [embedded figures]
In PDF Format
- Fact Sheet -- [PDF, 5.2 MB]
- Fact Sheet -- [PDF, Tabloid Layout, 5.2 MB]
Other Menus of Interest
- Mount St. Helens Current Eruption Menu -- CVO Menu
- Mount St. Helens General Menu -- CVO Menu

URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
URL for this page is: <http://pubs.usgs.gov/fs/2005/3036/>
If you have questions or comments please contact: Jon Major
Created April 15, 2005 by Lyn Topinka
Last modified March 9, 2007 by Michael Diggles