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Mount St. Helens
Mount St. Helens is an active volcano in Washington State's Cascade mountain range. Mount St. Helens erupted on May 18, 1980, causing the most deadly volcanic event in United States history.
397 Questions
Mount St. Helens is a relatively young volcano, formed about 40,000 years ago. Substantial modern eruptions have occurred in the periods 1490-1647, 1800-1857, and 1980-2008 (beginning with the catastrophic one).
Did mt saint helens erupt lava or just ash?
The main eruption of 1980 released ash, pumice, and gas. Smaller eruptions that occurred later produced very viscous lava that piled up into a lava dome.
When is mount saint Helens going to explode next?
There is no way of knowing. The timing of volcanic eruptions cannot be predicted accurately, even when a volcano is getting ready to erupt. Currently Mount St Helens is not showing any signs of imminent activity.
How big was the exclusion zone when mt st helens erupted?
The red exclusin zone was 5km where no activity could take place, the blue where some activity (fertilising trees, logging etc.) could take place was about 15km
Describe difference between the landform and topographic map of Mount St. Helens?
A landform map would show the physical features of Mount St. Helens, such as its shape and size, whereas a topographic map would also display the elevation changes on the mountain, including the contour lines that represent different elevations. The landform map would provide a more general overview of the mountain's physical characteristics, while the topographic map would offer a more detailed look at its elevation profile.
How did Kathy Anderson escape mt st helens eruption?
she had many escape rotes and evacuation points!
How much of the Mount St Helen cone was blown away during the May eighteen 1980 eruption?
Approximately 1,314 feet (400 meters) of the top of the cone was blown away during the May 18, 1980 eruption of Mount St. Helens in Washington. This explosive eruption resulted in the largest debris avalanche in recorded history.
How did the eruption of mt st helens effect people?
It killed people. It closed schools, it knocked out electricity, it made the sky go dark, not to mention the emotional distress. Not a fun time.
Is St Helen volcano a result of a hot spot or subduction?
Mount St. Helens is a result of subduction as the Juan de Fuca Plate is pushed under the North American Plate.
How did the people die in the Mount St. Helens explosion of 1980?
57 i think (may 9) 57 i think (may 9) 57 i think (may 9) 57 i think (may 9) 57 i think (may 9) 57 i think (may 9) 57 i think (may 9)
About 400 meters
The answer is 400 because 2950 - 2550 = 0400
When did the earthquakes happen in the mount St. Helens eruption of 1980?
March 20, 1980 was the date of the big eruption.
When mount st helens erupted did it form the hawiian islands?
No. The Hawaiian islands are formed by a mantle plume.
Does Mount St Helens lava flow violently or quietly?
Lava can't flow violently. Highly explosive eruptions such as the 1980 eruption of Mount St. Helens do not produce lava flows: they produce clouds of ash, gas, and pumice. Mount St. Helens has produced "quiet" lava flows at times.
In what country is Mount St Helens located?
Mount Saint Helens in in the state of Washington in the United States.
