[ARCHIVED THREAD] - Mt. St. Helens: Before and After (Page 4 of 4)
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I've got a jar of ash from the eruption. Collected in Spokane a few days after the event. Some 260 miles ENE of the mountain. I use it as a paper weight on my desk. It's fun to shake up and watch the ash settle. I had one too. Until my son turned it into mud. |
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Quoted: I just read the "18 volcanoes" article. I've never been there (that I'm aware of) so does anyone know what direction that picture is taken from of Crater Lake? Here's Crater Lake Lodge. You can see the island (Wizard island) on the left so looking at the other pic it's directly across from it on the other side. You can click on the link and it will give you an idea of which side its facing. http://www.willhiteweb.com/crater_lake_national_park/crater_lake_map.jpg   |
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Quoted: The wood swamp guys wet dream Quoted: The wood swamp guys wet dream One problem with the logs is the pumas embedded in them would wreck havoc on saw blades. Once you got past that than you'd have some nice logs. Also in the sloughs along the Columbia River, the Loggers would float their logs to the mills. I'm sure the bottoms of those are full of logs from 100 years ago to now. That shit would be priceless.  Ed eta; I used to cut a lot of wood |
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Two entirely different magma types. Hawaiian volcanoes expel very low viscosity, low gas content basalt lavas while those underlying Yellowstone are high viscosity, high gas content types. The longer the caldera charge cycle takes, the more gas (pressure) buildup can occur. When the magma is finally vented to the surface it'll explosively decompress and produce Plinian-style eruptions. That is, vertical ash columns, pyroclastic flows and a shit-load of tephra whose overall ejected volume is dependent on the size of the magma chamber supplying the system. In Yellowstone's case, nothing about a ring-fracturing eruption will be considered "low energy". Quoted:
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Just because the Yellowstone caldera is big doesn't mean that the eruption will be the end of the world. You never know with volcanic shit. It MIGHT kill us all, or it might just act like Hawaii...constant low energy gushing eruption for decades. Two entirely different magma types. Hawaiian volcanoes expel very low viscosity, low gas content basalt lavas while those underlying Yellowstone are high viscosity, high gas content types. The longer the caldera charge cycle takes, the more gas (pressure) buildup can occur. When the magma is finally vented to the surface it'll explosively decompress and produce Plinian-style eruptions. That is, vertical ash columns, pyroclastic flows and a shit-load of tephra whose overall ejected volume is dependent on the size of the magma chamber supplying the system. In Yellowstone's case, nothing about a ring-fracturing eruption will be considered "low energy". is it named after the roman who witnessed and described the pompei destruction ? |
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is it named after the roman who witnessed and described the pompei destruction ? Quoted:
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Just because the Yellowstone caldera is big doesn't mean that the eruption will be the end of the world. You never know with volcanic shit. It MIGHT kill us all, or it might just act like Hawaii...constant low energy gushing eruption for decades. Two entirely different magma types. Hawaiian volcanoes expel very low viscosity, low gas content basalt lavas while those underlying Yellowstone are high viscosity, high gas content types. The longer the caldera charge cycle takes, the more gas (pressure) buildup can occur. When the magma is finally vented to the surface it'll explosively decompress and produce Plinian-style eruptions. That is, vertical ash columns, pyroclastic flows and a shit-load of tephra whose overall ejected volume is dependent on the size of the magma chamber supplying the system. In Yellowstone's case, nothing about a ring-fracturing eruption will be considered "low energy". is it named after the roman who witnessed and described the pompei destruction ? . Yes. Pliny the Younger. Google it. |
Some pics of the crater.                 Large pic. http://www.mountsthelens.com/files/8-15-2012-msh-11-6x4b.jpg |
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Quoted:Two entirely different magma types. Hawaiian volcanoes expel very low viscosity, low gas content basalt lavas while those underlying Yellowstone are high viscosity, high gas content types. The longer the caldera charge cycle takes, the more gas (pressure) buildup can occur. When the magma is finally vented to the surface it'll explosively decompress and produce Plinian-style eruptions. That is, vertical ash columns, pyroclastic flows and a shit-load of tephra whose overall ejected volume is dependent on the size of the magma chamber supplying the system.
In Yellowstone's case, nothing about a ring-fracturing eruption will be considered "low energy". It's about time you wily scientists finally found something you know with absolute certainty. Bravo! |
| One of the crazy things that boogles my mind is when I read that "18 volcanoes"bis seeing the pictures of ones that erupted 1,300 and 2,000 years ago and the one 7,000 years ago!!! How there still is those white lines and that clear cut circle of ZERO life even THOUSANDS of years later!!!!! It makes you think about how fragile(NOT INSIGNIFICANT) life is |
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Quoted: One problem with the logs is the pumas embedded in them would wreck havoc on saw blades. Once you got past that than you'd have some nice logs. Also in the sloughs along the Columbia River, the Loggers would float their logs to the mills. I'm sure the bottoms of those are full of logs from 100 years ago to now. That shit would be priceless. Ed eta; I used to cut a lot of wood Quoted: Quoted: The wood swamp guys wet dream One problem with the logs is the pumas embedded in them would wreck havoc on saw blades. Once you got past that than you'd have some nice logs. Also in the sloughs along the Columbia River, the Loggers would float their logs to the mills. I'm sure the bottoms of those are full of logs from 100 years ago to now. That shit would be priceless. Ed eta; I used to cut a lot of wood I had several friends that sawed salvage timber in the St. Helens blast zone. They were going through 2 to 3 chains a day, each. They had to wear masks too. A lot of the timber they were cutting was old growth that had been knocked down by the blast. I was told they had to clear a 'girdle' on the logs of any bark with a hatchet first - then sweep it clean with a broom, before they fired up their saws, in an effort to remove as much of the silica as they could. They still went through that many chains. They made a ton of dough, but it sounded like a bunch of extra work. |
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Melted dashboard about 8 miles north of Mt. St. Helens shows the intense heat that far away from the core eruption. http://cdn2-b.examiner.com/sites/default/files/styles/image_content_width/hash/e8/e7/e8e7dcd5a30e79a82d99cc46c2649e30.jpg?itok=uXQr1-Fd '71 Chevrolet pickup. |
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Quoted: That last pic is great. Quoted: Quoted: Quoted: I just read the "18 volcanoes" article. I've never been there (that I'm aware of) so does anyone know what direction that picture is taken from of Crater Lake? Here's Crater Lake Lodge. You can see the island (Wizard island) on the left so looking at the other pic it's directly across from it on the other side. You can click on the link and it will give you an idea of which side its facing. http://www.willhiteweb.com/crater_lake_national_park/crater_lake_map.jpg http://i.huffpost.com/gen/1192417/images/o-CRATER-LAKE-LODGE-facebook.jpg http://static1.businessinsider.com/image/5410730c6bb3f7d770123b2a-1200/crater-lake-caldera-in-oregon-was-formed-when-a-volcano-named-mount-mazama-erupted-violently-7700-years-ago-the-interaction-between-magma-and-water-is-likely-to-produce-explosive-eruptions-in-the-future.jpg That last pic is great. It's deep too. I think the deepest part is around 1900ft or so. |
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Was equal to about a 24 megaton bomb going off. This crazy rock slab in the crater was growing @4-5ft everyday as was estimated at about 400+ft tall. https://symonsez.files.wordpress.com/2010/05/sthelensrockslab.jpg http://media2.s-nbcnews.com/j/msnbc/Components/Photos/060504/060504_sthelens_hmed_5p.grid-6x2.jpg 4-5' a day damn. Scientist will estimate it took 100million years to form 
Harry Truman is still entombed at his lodge 150ft below debri. http://content.lib.washington.edu/cgi-bin/getimage.exe?CISOROOT=/wastate&CISOPTR=1423&DMSCALE=100.00000&DMWIDTH=800&DMHEIGHT=517.70833333333&DMX=0&DMY=0&DMTEXT=&REC=1&DMTHUMB=0&DMROTATE=0 http://upload.wikimedia.org/wikipedia/commons/3/34/Sthelensharrytruman.jpg |
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Quoted: My brother was in Spokane. After a foot of Ashe fell, he packed his kit and said "You can all go to hell, I am going to Texas."  Quoted: Quoted: I've got a jar of ash from the eruption. Collected in Spokane a few days after the event. Some 260 miles ENE of the mountain. I use it as a paper weight on my desk. It's fun to shake up and watch the ash settle. My brother was in Spokane. After a foot of Ashe fell, he packed his kit and said "You can all go to hell, I am going to Texas." meh, same dif.  |
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You guys are NOT making me feel any better about the Yellowstone caldera. 1 in 700,000 chance This should put your mind at ease... Here's a nice pic of how the ash settled from Mt St Helens versus a few other volcanos in the area. For comparison. 
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Quoted: Wow that eruption induced lightning is pretty wild looking! You can listen to some of it here. https://www.youtube.com/watch?v=eXxjEnTM7Cw |
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I flew over it a couple of days after the eruption,pretty impressive. Quoted:
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I took a PSA flight from SFO to Sea-Tac about a month after the eruption. The pilot took a couple of steep orbits over the caldera, one for each side of the plane. It was like looking at the surface of the moon. Unbelievable. I flew over it a couple of days after the eruption,pretty impressive. Flew over in what with the ash in the air? |
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If Yellowstone went off the whole world would be fucked, not just a corner of WA. Quoted:
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You guys are NOT making me feel any better about the Yellowstone caldera. Naw. Yellowstone will make Mt. St. Helens look like a little misfire. Not even near the same orders of magnitude. Will that affect 22lr availability?
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Quoted: It's deep too. I think the deepest part is around 1900ft or so. 1943 feet and the deepest lake in the US, and 7th deepest in the world. THAT would have been an eruption to see. Not to mention the caldera collapse. I don't think there have been any notable caldera formations in modern times, but it must surely be an impressive event - especially when on the scale of what happened at Mt Mazama or Yellowstone. I think the closest we are likely to get to witnessing a collapse is going to be the much calmer events that happen in Hawaii, like this video I found hosted at WSJ from the crater floor collapse at Kilauea. |
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The rock is still there it's just spread all over Washington State. Mostly in powder form. Quoted:
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That's alot of missing rock. The rock is still there it's just spread all over Washington State. Mostly in powder form. A surprising amount of it ended up downhill; there was a massive landslide that appeared to trigger the eruption. go to 1:10 for landslide |
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You guys are NOT making me feel any better about the Yellowstone caldera. 0:55! |
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Quoted: 1943 feet and the deepest lake in the US, and 7th deepest in the world. THAT would have been an eruption to see. Not to mention the caldera collapse. I don't think there have been any notable caldera formations in modern times, but it must surely be an impressive event - especially when on the scale of what happened at Mt Mazama or Yellowstone. I think the closest we are likely to get to witnessing a collapse is going to be the much calmer events that happen in Hawaii, like this video I found hosted at WSJ from the crater floor collapse at Kilauea. Quoted: Quoted: It's deep too. I think the deepest part is around 1900ft or so. 1943 feet and the deepest lake in the US, and 7th deepest in the world. THAT would have been an eruption to see. Not to mention the caldera collapse. I don't think there have been any notable caldera formations in modern times, but it must surely be an impressive event - especially when on the scale of what happened at Mt Mazama or Yellowstone. I think the closest we are likely to get to witnessing a collapse is going to be the much calmer events that happen in Hawaii, like this video I found hosted at WSJ from the crater floor collapse at Kilauea. Yea I can't imagine how spectacular it would be with 1900 ft of water suddenly collapsing onto the magma chamber. Would be a more explosive event then Mount St Helens for sure.  |
 Miner's Car by depercy, on Flickr Spirit Lake by depercy, on Flickr |
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Wow that eruption induced lightning is pretty wild looking! You can listen to some of it here. https://www.youtube.com/watch?v=eXxjEnTM7Cw The Smiling Skull at 1:32 or so is spooky! Flames, plumes, seem to make faces appear. |