Mount St. Helens is an active stratovolcano in the Cascade range in the state of Washington, approximately 53 miles (85 km) NE of Portland, OR.
On May 18, 1980, an earthquake marked the collapse of the north face of the mountain at 8:32 AM PDT. A violent pyroclastic explosion of magma occurred, hurling huge quantities of rock, ash and dust to the north and east. The eruption continued for more than nine hours before lessening around 5:30 PM PDT. 57 persons were directly killed, forests were flattened, and torrents of ash, mud, and debris choked the nearby rivers, destroying bridges and industry. Much of eastern Washington state was affected by the ash and dust plume.
(for other eruptions, see related link)
An earthquake at 8:32:17 a.m. on Sunday, May 18, 1980 caused the eruption on Mt St. Helens
Mt. St. Helens last major eruption was on may 18 1980. But this volcano remains active and often spurts ash and other debris.
The last minor eruption of Mount St. Helens was in July of 2008.
Mount St Helens last produced a few small eruptions in 2008.
The earthquake before the eruption accured at 5.00am and the eruption it's self was at 8.32.
It has erupted several times; it is actually the most active volcano in its region.
The most recent eruptions were the following:
May 18 1980 Answer: Eruptions happen every day, Mt. St Helens, as well as all active volcanoes do. The date above is correct as far as the most current major eruption, but she has had quite a few that generated 3.2 mag. quakes since then. Check out the link below this post. It is from the USGS Johnson Ridge observatory on the rim of the crater of Helen...it will give you a minute by minute update cam views as well as to whats going on up there, as well as charts anf graphs of her history. The links in the page also tell you the history of activity.
Mount St. Helens last erupted from September 23, 2004 through to the 10th of July 2008.
Please see the related links for more information.
I dont know for sure. I want o know this for my projectt
The most recent eruption was known to be may 1980
It looks like 1991 sometime there were some small eruptions. Looks like it is still grumbling today, but no eruptions.
The last big eruption was May 17, 1980 there might have been small eruptions but nothing like the eruption in 1980! Hope this helps!
2008.
It was 2004-2008 (on going)
Mt Saint Helens erupted when plates collided together and made the eruption blast! The last time Mt Saint Helens erupted was July, 10, 2008!!!!!!!!!!!!!!!!!!!!!
The eruption of Mount St. Helens in 1980 lasted for 9 hours
Not as volcanoes go: it is about 40,000 years old and continues to change, erupting violently at least three times in the last 500 years.
The last eruptive activity of Mount St Helens was in July of 2008.
Mount Merapi last erupted in 2010.
15648 people died
Mt Saint Helens erupted when plates collided together and made the eruption blast! The last time Mt Saint Helens erupted was July, 10, 2008!!!!!!!!!!!!!!!!!!!!!
They're both volcanoes; one difference is that Mt. St. Helens was recently active and Yellowstone last erupted hundreds of thousands of years ago.
about as 50% chance that mount saint helens' eruption is way bigger than mount fuji
The eruption of Mount St. Helens in 1980 lasted for 9 hours
Not as volcanoes go: it is about 40,000 years old and continues to change, erupting violently at least three times in the last 500 years.
Mount Saint Helens is in Skamania County,Washington. It last exploded on May 18, 1980. The stratovolcano is still active today.
The last eruptive activity of Mount St Helens was in July of 2008.
Mount St. Helens produced a series of lava dome building eruptions from 2004 to 2008.
Mount Merapi last erupted in 2010.
No, not by any definition. If you define the "youngest volcano" by "most recently erupted", then that honor goes to Kilauea, which has been erupting non-stop since 1983. Mount St. Helens last "erupted" in early 2008 when steam escaped from a fracture in the lava dome.
Tahoma, or Mount Rainier is the most dangerous volcano in Washington. Seismic monitoring of the large stratovolcano has revealed 24 earthquakes in the last thirty days, versus 17 earthquakes at Mount Saint Helens (11/5/19). https://pnsn.org/volcanoes