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The famous eruption of Mount st Helens in 1980 was a VEI-5.

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12y ago

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What was the magnitude of the mt st Helens eruption in 1980?

Wikipedia lists its explosive index as 5. Read below for more details about the Volcanic Explosivity Index.


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Mt. Toba is a supervolcano, which is a type of volcano capable of producing massive eruptions with a Volcanic Explosivity Index (VEI) of 8, the highest level. These types of eruptions are thousands of times more powerful than typical volcanic eruptions.


What the 1951 eruption of Mount Lamington register on the Richter Scale?

The 1951 eruption of Mount Lamington in Papua New Guinea was estimated to have a Volcanic Explosivity Index (VEI) of 4. The Richter Scale is not typically used to measure the size of volcanic eruptions; instead, the VEI is commonly used to classify and compare the explosiveness of volcanic eruptions.


What is an example of a volcanic mountain?

mt st helens :D


Which were the worst volcanic eruptions in history?

mt. saint helens


How strong is Mt St Helens?

Mt St Helens erupted at 8:32 am PDT on May 18, 1980(a VEI 5 event). it erupted with 24 megatons of thermal energy. so yes, Mt St Helens was a very strong and large eruption. history repeats itself so it is safe to assume that it will happen again.


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Because if it's volcanic origins


What is the VEI rating for Mt kilauea's last eruption?

The eruption, which is still going on, is a VEI-0.


In Washington state mountain gave north America its largest volcanic eruption?

Mt Helens


Where in the US is silt found?

Around volcanic regions. Such as west coast mountains like, Mt Rainier, and Mt St Helens.


What 3 states in lower 48 states are subject to volcanic hazards?

Washington (Mt Rainier, Mt Saint Helens) Oregon (Mt Adams and others) California (Mt Shasta and others). Yellowstone Park has many volcanic hazards.


What intensity is mount st Helens?

If the question is referring to the explosive intensity of Mt. St. Helens, it would depend on the eruption that you are referring to. In regards to the most well known eruption in historical times (May 18, 1980) it is registered by the United States Geological Service as a Volcano Explosivity Index 5 (VEI 5). Which is a very powerful eruption compared to how often they occur.