geology

Home » Volcanoes » Mount St. Helens

Mount Saint Helens Videos from USGS

Recounting a 30-year history of eruptions and monitoring


Videos released in May, 2010 by the United States Geological Survey.


Mount St. Helens Background



Mount St. Helens is a stratovolcano located in southern Washington, in the western part of the Cascade Mountain Range. It is about 100 miles south of Seattle, Washington and 50 miles northeast of Portland, Oregon. It is an eruptive volcanic cone built up of interlayered ash, pumice, lava flows, volcanic domes and other deposits. It is a young volcano. The first eruptions occurred about 40,000 years ago and it grew in a series of eruptive stages.


Modern Eruptions



The most recent eruption series at Mount St. Helens began on May 18, 1980 at 8:32 AM. This eruption was catastrophic. To date it has been the deadliest and most costly volcanic eruption in the history of the United States. Fifty-seven people were killed and hundreds of square miles of landscape was covered by blast debris, ash, lahars and pyroclastic flows.


The Opportunity for Monitoring



Numerous other eruptions followed and these eruptions were used by researchers to learn more about monitoring volcanies, test equipment and refine monitoring techniques. In the videos at right, United States Geological Survey researchers explain how they learned from the eruptions and what their new information means for future volcanic monitoring efforts.



Find it on Geology.com




More from Geology.com


US Diamond Mines
US Diamond Mines: Did you know that diamonds can be found in the United States?
The San Andreas Fault
The San Andreas Fault: A feature that separates the Pacific and North American Plates.
K2 Granite - aka K2 Jasper
Azurite Granite ? A white granite with blue orbs of azurite. A new material from Pakistan.
Green Gemstones
Green Gemstones - emerald, peridot, jade, tsavorite, chrome diopside, chrysoprase, and more.
tumbled stones
Tumbled Stones are rocks that have been rounded, smoothed and polished in a rock tumbler.
Roadside Geology
Roadside Geology Guides - Explain the roadside geology of your favorite state.
Facts About Diamonds
Interesting Facts About Diamonds: You are a diamond expert if you know all of these!
Where Do Bears Live
Where Do Bears Live in North America? Geographic range of grizzly, polar and black bears.


United States Geological Survey scientists involved in resopnding do the 1980 eruption of Mount St Helens recount their experience, explain the impact of the eruption, its magnitude and what they learned about volcanoes. USGS video.




United States Geological Survey scientists . USGS video.


Diamonds Don't Form From Coal
Largest Oil Spills Map
San Andreas Fault
Igneous, Metamorphic, and Sedimentary Rocks
The Only Diamond Mine in the USA
Marcellus Shale
What is Geology?
Articles About Volcanoes





© 2005-2016 Geology.com. All Rights Reserved.
Images, code, and content on this website are property of Geology.com and are protected by copyright law.
Geology.com does not grant permission for any use, republication, or redistribution.
Images, code and content owned by others are marked on the pages where they appear.