Which volcano am I? #5

I am an active, composite volcano. I am most famous for my eruption on 18th May 1980. Volcanic ash and pyroclastic flows made me the deadliest and most economically destructive volcano in the history of the United States. The cost to repair the damage done was over 3 billion dollars! Which volcano am I?

I’ll award two signatures for identifying the correct volcano before I reveal the answer and then further signatures for anyone posting facts. Good luck! :)

 

Well done to Josh, Jessica and Nikola, it is Mount St Helens. Can anyone post any good facts now..?

12 thoughts on “Which volcano am I? #5

  1. It had 57 deaths, $1.1 billion in property damage.
    In 1980, a major volcanic eruption occured at Mount.st Helens, a volcano located in state of Washington…

  2. Hi guys I’m having a great time at my new school I hope you’re all having an excellent time back a Worksop;right I might know the volcano is it mount st. Helens and it got up to (154 km) in the sky and up to
    ( 50-80km)- north east and it erupted at 8:32(a.m)!: 0

    1. Hey Klark it’s great to hear from you 🙂 I’m glad you’re getting on well at your new school. Why don’t you let us know what you’re learning about?

  3. Mount St.Henlens
    In 1980, a major volcanic eruption occurred at Mount St. Helens, a volcano located in state of Washington, in the United States. The eruption (which was a VEI 5 event) was the only significant one to occur in the contiguous 48 U.S. states since the 1915 eruption of Lassen Peak in California. The eruption was preceded by a two-month of earthquakes and steam-venting , caused by an injection of magma at shallow depth below the volcano that created a huge bulge and a fracture system on the mountain’s north slope.Prior to the eruption, USGS scientists convinced local authorities to close Mount St. Helens to the general public and to maintain the closure in spite of local pressure to re-open it; their work saved thousands of lives.Prior to the eruption, USGS scientists convinced local authorities to close Mount St. Helens to the general public and to maintain the closure in spite of local pressure to re-open it; their work saved thousands of lives. An earthquake at 8:32:17 a.m on Sunday, May 18, 1980, caused the entire weakened north face to slide away, suddenly exposing the partly molten, gas- and steam-rich rock in the volcano to lower pressure. The rock responded by exploding a hot mix of lava and pulverized older rock toward Spirit Lake so fast that it overtook the avalanching north face.

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