0
Mount St. Helens remains a potentially active and dangerous volcano, even though it is now (1995) quiescent. In the last 515 years, it is known to have produced 4 major explosive eruptions (each with at least 1 cubic kilometer of eruption deposits) and dozens of lesser eruptions. Two of the major eruptions were separated by only 2 years. One of those, in 1480 A.D., was about 5 times larger than the May 18, 1980 eruption, and even larger eruptions are known to have occurred during Mount St. Helens' brief but very active 50,000-year lifetime. Following the most recent major eruption, on May 18, 1980, there were 5 smaller explosive eruptions over a period of 5 months. Thereafter, a series of 16 dome-building eruptions through October 1986 constructed the new, 270-meter- (880-feet) high, lava dome in the crater formed by the May 18, 1980 eruption.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Is Mt Bachelor an extinct volcano?
No. Mount Rainer is dormant. Its last eruption was in 1894, which is recent in geologic terms. There are no signs of an imminent eruption, but there is little doubt that it will erupt again eventually. An eruption of Mount Rainier would pose a very serious threat to the cities of Tacoma and Seattle. Because of this it is considered one of the most dangerous volcanoes in the world.
What is mount st helens most recent eruption?
2008
What was the magnitude of the most recent eruption of mount shasta?
what is the latitude and longitude for mt shasta
How many people died in the 2014 Mount Etna eruption?
lots. 15,000 died in Etna's most recent eruption. hope it helps no it didnt
What is the volume of Mount Rainier?
Mount Rainier is considered to be the most spectacular mountains that dominate a metropolis on earth. The volume of Mount Rainer is 17.6 cubic miles.
What was the most recent eruption and most destructive eruption of mount fuji?
most recent and destructive was the eruption that was in 1707-1708
When was Mount Rainier started to be not active?
Mount Rainier had a number of eruptions during the 1800s. Its last known eruption was in 1894. It is among the most active volcanoes in the Cascade mountain range.
When was mount mayons most recent eruption?
in December of 2009
Is Mt Bachelor an extinct volcano?
No. Mount Rainer is dormant. Its last eruption was in 1894, which is recent in geologic terms. There are no signs of an imminent eruption, but there is little doubt that it will erupt again eventually. An eruption of Mount Rainier would pose a very serious threat to the cities of Tacoma and Seattle. Because of this it is considered one of the most dangerous volcanoes in the world.
When were the two most recent Mount Etna eruptions?
a recent eruption was in September 2007.
What is mount st helens most recent eruption?
2008
What is mount Fuji's most recent eruption?
1707 (304 years ago from 2011)
What was the magnitude of the most recent eruption of mount shasta?
what is the latitude and longitude for mt shasta
What was the last eruption like Ash or Lavaflow for MT Pinatubo?
The most recent eruption of Mount Pinatubo produce ash and pumice.
Did mt Vesuvius ever erupt?
Yes. Mount Vesuvius has a long history of eruptions. Its most famous eruption was in 79AD. Its most recent eruption was in 1944.
What are the dates of mount ednas two most recent eruptions?
The dates of Mount Etna's two most recent eruptions was 1991 and 1983. Before that eruption occurred in 1949, 1971, and 1981.
How many people died in 2008 volcano Mount Merapi?
there wasnt an eruption in 2008 if i sm not wrong.the most recent eruption in 2006.
