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Mount St. Helens - Wikipedia


Mount St. Helens or Louwala-Clough is an active stratovolcano located in Skamania County, ... Age of rock, < 40,000 yrs. Mountain type, Active stratovolcano.

Mount St. Helens - Facts and Figures


Location: State of Washington, USA Latitude and Longitude: 46.2º N, 122.2º W, Elevation: 2,549 m (8,363 ft) Volcano Type: Stratovolcano Earliest Eruption: ...

30 Cool Facts about Mount St. Helens


Apr 30, 2010 ... 1—During the past 4,000 years, Mount St. Helens has erupted more frequently than any other volcano in the Cascade Range. 2—Most of ...

USGS: Volcano Hazards Program CVO Mount St. Helens


Feb 12, 2013 ... USGS: Volcano Hazards Program - Cascades Volcano Observatory. ... Prior to 1980, Mount St. Helens had the shape of a conical, youthful volcano sometimes referred to as the Mount Fuji of ... Volcano type: Stratovolcano

Mount St. Helens: Facts about deadliest U.S. volcanic event 35 ...


May 15, 2015 ... Thirty five years ago, Mount St. Helens erupted in Washington, spewing ash, rock and hot gases into the air and causing mud to flow down the ...

Mt. St. Helens History - Mount St. Helens


Mount St. Helens, other active Cascade volcanoes, and .... also began recording occasional spasms of volcanic tremor, a type of continuous, rhythmic ground

How Volcanoes Work - the Mt. St. Helens eruption


The 1980 eruption of Mt. St. Helens is the most studied volcanic eruption of the .... underlying magma reservoir resulted in the waning of Plinian-type eruptions.

Volcanoes - Weather Wiz Kids weather information for kids


An erupting volcano can trigger tsunamis, flash floods, earthquakes, mudflows and ... Mt. Rainier and Mount St. Helens are examples of this type of volcano.

Mount St. Helens Fast Facts - CNN.com


Jul 26, 2013 ... View the Mount. St. Helens Fast Facts on CNN and learn more about the volcano in the Cascade Mountains in Washington state.

Mount St. Helens | Volcano World | Oregon State University


Prior to 1980, Mount St. Helens formed a conical, youthful volcano sometimes known as the Fuji-san of America. During the 1980 eruption the upper 400 m of ...

Mount St. Helens is an active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States.
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Mount St. Helens Eruption: Facts & Information - Live Science


Feb 28, 2013 ... Mount St. Helens erupted on May 18, 1980. The volcano, located in southwestern Washington, used to be a beautiful symmetrical cone about ...

How old is Mount St. Helens? - U.S. Geological Survey


The eruptive history of Mount St. Helens (Washington) began about 40,000 years ... The range of rock types erupted by the volcano changed about 2,500 years ...

Mount St. Helens, July 22, 1980 - USGS: Volcano Hazards Program ...


Feb 7, 2013 ... USGS: Volcano Hazards Program - Cascades Volcano Observatory USGS ... July 22, 1980 eruption of Mount St. Helens sent pumice and ash 6 to 11 mi ... This type of activity is known as a hydrothermal or phreatic eruption.