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Alaskan avalanche "equalled 3.8 scale earthquake"
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Poster:
A snowHead
Poster:
A snowHead
A huge avalanche of ice and rock from Mount Steller in Alaska on 14 September was registered by seismologists as equal to a 3.8 level earthquake.
A section of the mountain, which is 80 miles east of Cordova, collapsed 8000 vertical feet onto the Bering Glacier. A Swiss avalanche expert in the area at the time estimated the amount of rock and ice that broke loose was equal to a pile one mile long, a third of a mile wide and 50 yards high.
More than 200 seismometers across Alaska picked up vibrations from the avalanche. A local scientist, Jackie Caplan-Auerbach of Alaska Volcano Laboratory, has pointed out that avalanches of this type sometimes rumble 30 minutes to 2 hours before they collapse, possibly due to the fracturing of ice at the base of the avalanche material.
This report from
Anchorage Daily News.
Obviously
A snowHead
isn't a real person
Obviously
A snowHead
isn't a real person
Wow that's about 37.5 Million Cubic Metres of rock and ice which will be around 37.5 M tonnes tumbling 8000 ft !!! No wonder it made the earth move. The debris spread out into a delta shape as far as 6 miles from the mountain. Scary.
Well, the person's real but it's just a made up name, see?
Well, the person's real but it's just a made up name, see?
How would this compare to Mount St Helens in terms of tonnes of rock and ice displaced???????
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Mt St Helens displaced 1.2 cubic km of material or arround 1.2 million million cubic meters so it moved about 32,000 times more material
Anyway, snowHeads is much more fun if you do.
Anyway, snowHeads is much more fun if you do.
D G Orf wrote:
Mt St Helens displaced 1.2 cubic km of material or arround 1.2 million million cubic meters so it moved about 32,000 times more material
Which equates to an energy release that was approximately 20,000 times the size of the Hiroshima atomic bomb.
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