Mount St. Helens Volcano - Current Update
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, August 22, 2008 09:48 PDT (Friday, August 22, 2008 16:48 UTC)
Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN
NOTICE: Mount St. Helens has been at Volcano Alert Level NORMAL and Aviation Color Code GREEN for the past month; therefore, we are migrating from a Mount St. Helens weekly update to a Cascade Range weekly update. As long as all Cascade Range volcanoes are at Normal and Green, we will continue to issue Cascade Range weekly updates. If a Cascade Range volcano shows signs of unrest, we will issue an update for that particular volcano.
Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake, Mount Shasta, and Lassen Peak in northern California.
Recent Observations: Volcano seismicity at Mount St. Helens has remained quiet, although several seismometers near Crater Glacier are recording small rock fall events and 'ice quakes' resulting from glacier movement. Microwave links to the SEPT and VAULT seismic stations at Mount St. Helens were lost on Monday as a result of lightning strikes. Repairs were made and links were restored on Thursday. A field crew is at Three Sisters volcano this week, conducting deformation monitoring using GPS and leveling methods.
The U.S. Geological Survey and University of Washington continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted
Source: Cascade Range Current Update
Mount St. Helens VolcanoCam
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This is a static image of Mount St. Helens, taken from the Johnston Ridge Observatory.
The Observatory and VolcanoCam are located at an elevation of approximately 4,500 feet,
about five miles from the volcano.
You are looking approximately south-southeast across the North Fork Toutle River Valley.
The VolcanoCam image automatically updates approximately every five minutes. |
Information courtesy of ...
U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington
USGS Cascades Volcano Observatory
Cascade Range Current Update
USGS Alert-Notification System for Volcanic Activity
Volcano Observatories: Alaska
Volcano Observatories: Cascades
Volcano Observatories: Hawaii
Volcano Observatories: Long Valley
Volcano Observatories: Mariana Islands
Volcano Observatories: Yellowstone