When was Mount St Helen's most recent eruption? Thanks.
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When was Mount St Helen's most recent eruption? Thanks.
I did this in Y9.
It was in 1980 or something.
I freaking deleted the file on my PC.
Crap!
May 18, 1980
That was the latest eruption? Hmm. I'm not sure though, I thought I read somewhere it was this year or something :s. But thanks for trying to help, +rep.
To my knowledge Clazzz is correct [:
may 18th 1980 at 8.32 to be exact.
But, apprently it is ongoing at the minute :]
http://en.wikipedia.org/wiki/Mount_St._Helens :D
I did a whole project on this as well a few years ago - was actually really interesting.
Your best bet is probably just using google and what not mate, but from my research just confirms the same as claz!
I believe 18th May 1980 was it's biggest eruption, but not the latest. I think it had minor eruptions after that, since it's an active volcano. But +rep to you too for trying to hel. For Ostinato I believe I have to spread first. :P
Hmm, not sure, but if i remember it was the 1980's one that i did in Geo;
"2004-present activity
Main article: 2004 and later volcanic activity of Mount St. Helens
Mount St. Helens became active again in autumn 2004, indicated initially by hundreds and then thousands of localized earthquakes, and followed by several significant emissions of steam and ash.
http://upload.wikimedia.org/wikipedi...cember2004.jpg http://en.wikipedia.org/skins-1.5/co...gnify-clip.png
A steam plume rises from the mountain in December 2004
http://upload.wikimedia.org/wikipedi...ck_2-22-05.jpg http://en.wikipedia.org/skins-1.5/co...gnify-clip.png
'Whaleback' feature on February 22, 2005.
Magma reached the surface of the volcano around October 11, 2004, resulting in the building of a new lava dome on the existing dome's south side. This new dome continued to grow throughout 2005 and into 2006. A number of transient features were observed such as the "whaleback" which were long shafts of solidified magma being exuded by pressure of magma underneath it. These features are very fragile and break down soon after they are formed.
Mount St. Helens had significant activity on March 8, 2005 when a 36,000-foot (11,000 m) plume of steam and ash emerged, which was visible from Seattle, Washington and rained ash on Yakima, Washington. This activity was not considered a large eruption, merely a minor release of pressure consistent with the nature of ongoing dome building. The release was accompanied by a magnitude 2.5 earthquake.
The Mount St. Helens VolcanoCam [1] located at Johnston Ridge is able to view the new dome especially at night when the glow of new magma is visible via the camera's infrared capabilities. While geologists warn that an eruption similar to the May 1980 eruption is still possible, the chances are low.
On July 2, 2005, the tip of the whaleback feature broke off, causing a rockfall that sent ash and dust several hundred meters into the air. [2]"
Latest info on it. :).
Thanks Steven, that helped alot. :D
Do your own work!Quote:
Originally Posted by Herman
I was just trying to be sure :rolleyes: If you actually read the previous posts you'd realise that! If you don't have anything better to say, don't say it!Quote:
Originally Posted by Long-Wait