|
|
Highlights !!!
|
Q: How big is the new lava dome ???.
The volume of the new lava dome as measured July 5, 2007, was 122 million cubic yards (volume is equivalent to 150 to 200 large sports stadiums) and was growing at an average rate of 0.14 cubic yards per second (nearly equivalent to filling 4 Olympic-sized swimming pools every day.
[Information release, February 21, 2008]
[More]
|
News
- Mount St. Helens Returns to Slumber:
The nearly three and a half years of eruption at Mount St. Helens is over for now and on July 10, 2008, scientists lowered the volcano alert level from Advisory to Normal and the aviation color code from Yellow to Green.
READ more about it ...
Eruption
Photo Gallery
Features and Information
New Online
Background Information
-
Alert Levels for the Cascade Range Volcanoes - Information
-
Aviation Color Codes
-- Alaska Volcano Observatory's "Level-of-Concern" Color Code, USGS Fact Sheet FS030-97
-
Glossary of Volcano Terminology
-
Hazards Map - Mount St. Helens Hazards Zones
-- [regional, large-scale, JPG Format, 467K, 1084x715pixels]
-
Hazards Report - Volcanic-Hazard Zonation for Mount St. Helens, Washington, 1995, USGS Open-File Report 95-497
-- Current Hazards Report
-
LIDAR
-
Location Map - Cascade Range Volcanoes
-
Location Map - Mount St. Helens
-
Media Advisory - Interior Secretary Gale Norton visit, October 2, 2004
-- [PDF Format]
-
Mount St. Helens -- From the 1980 Eruption to 2000, USGS Fact Sheet FS036-00
-
Mount St. Helens Erupts Again --
Activity from September 2004 through March 2005, USGS Fact Sheet FS2005-3036
-
Past Updates, Advisories, and Information Statements for the Cascade Range
-
Past Updates, Advisories, Information Statements, and Monthly Seismic Graphs for Mount St. Helens
-
Seismic Signal Examples -- including a small gas and ash explosion
-- [PDF Format, 915K]
-
U.S. Geological Survey’s Alert Notification System for Volcanic Activity
-- Gardner and Guffanti, 2006, USGS Fact Sheet 2006-3139
-
Volcanic Ash Website -- "What it can do and how to prevent damage"
-- Link
-
Volcanic Explosivity Index (VEI) information
-- [PDF Format, 1.4M]
Other Menus of Interest
|
|
