Mount St. Helens Energy Budget
Seismic Energy (3/20-5/18) = 1.8x1013 Joules
Deformation (3/20-5/18) = 2 x1016 Joules
Steam eruptions (3/20-5/14) = 1 x1014 Joules
Avalanche - gravitational energy (5/18) = 5 x1016 Joules
Avalanche - thermal energy (5/18) = 2 x1017 Joules
Lateral Blast - mechanical energy (5/18) = 3 x1016 Joules
Lateral Blast - thermal energy (5/18) = 2 x1017 Joules
Hydrothermal (5/18) = 1 x1017 Joules
Thermal Energy of Eruption Cloud (5/18) = 8.3x1017 Joules
Thermal Energy of Pyroclastic Flows (5/18) = 3.3x1017 Joules
Dome growth (5/25-12/31/1980) = 1.7x1017 Joules
Total Energy Release during 1980 = 1.9x1018 Joules
= 450 megatons
= 27,000 Hiroshima bombs (1 per second for 9 hours)
= 250 times US power generation capacity
= 2.7x1013 cups of coffee (one cup per minute for every US citizen for 65 days)
And to think the Japanese thought an atomic bomb was bad. They should be counting their lucky samurais that we didn't drop Mount St. Helen. There wouldn't even be an island left.
I thought you were building sand castles at Ocean Shores.
Anyone else remember making "snowmen" from the ash?
I was 5 when it blew and I have never forgot the sight of the ash plume....leaves an impression.
I reeeeaaally laughed out loud on the "lucky Samurai's" comment!!!
I was 5 as well when it went and remember the ash plume as well and not being able to play outside for about a week. The mountain is almost directly north from my parents house. So we had a great view of the plume. I think my parents still have a bunch of pictures from the day it blew.
Today I read in the paper how all the victims died supposedly and where they found the bodies and where they think the 11 confirmed dead but never recovered bodies are. There is like 4 people that are reported missing but they do not know if the mountain claimed their lives.
Confirmed Dead (Story here)
The volcano lost its top 1,313 feet on May 18, 1980, shedding a total volume of 3.7 billion cubic yards of material. That's enough to cover the entire state of Washington in a half-inch of mountaintop; instead, it buried 14 miles of the Toutle River Valley to an average depth of 150 feet.
There was enough ash released during the eruption to cover the area of a football field to a depth of 150 miles.
I wasn't alive then, but my mom and dad remember it well. They had a pretty good dose of ash near Salem where they grew up. Even here in Eugene, 150 miles from the mountain, got a small dusting of ash and we are not even in the direction the wind blew.
Oh Harry Truman your sprit lake is gone but oh Harry Truman
your sprirt will live on and on.
i remmember it lots of ash i didnt see it well sky was gray with ash and overcast but i think it was the
second eruption i saw while walking arcoss a field on sunny day pretty awsome sight.