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Mount St. Helens
Random Chaos
Actually Carefully-selected Order in disguise
in Zocalo v2.0
If you haven't heard...Mt St Helens is quaking for the first time in 20 years...
Here's the official discussion: [url]http://vulcan.wr.usgs.gov/Volcanoes/Cascades/CurrentActivity/current_updates.html[/url]
And here are photos of the work they are doing: [url]ftp://ftpext.usgs.gov/pub/wr/wa/vancouver/MSH_Images/[/url]
:)
Here's the official discussion: [url]http://vulcan.wr.usgs.gov/Volcanoes/Cascades/CurrentActivity/current_updates.html[/url]
And here are photos of the work they are doing: [url]ftp://ftpext.usgs.gov/pub/wr/wa/vancouver/MSH_Images/[/url]
:)
Comments
[url]http://earthquake.usgs.gov/shakemap/nc/shake/[/url]
Especially since if there is a large ash ploom we will get the jobs of cleaning it up at our respective domiciles!!
[B]better put on your asbestos undies...[/B][/QUOTE]Well, pyroclastic flow would still burn you! (or your lungs when you breath)
[url]http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/[/url]
[img]http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/energynum1998.gif[/img]
Something is "cooking up".
Dome might be gonna grow little bigger... or "fly to the air".
[B]My self, and I am sure Croxis are paying carefull attention to this development.
Especially since if there is a large ash ploom we will get the jobs of cleaning it up at our respective domiciles!! [/B][/QUOTE]
One of my teachers lived about 100 km from that mountian,, he said it threwrock and shit that far.
[B]Threw shit that far? Wow - volcano's must be the world's toilet! :p [/B][/QUOTE]
Well there probably were a couple of porta poties involved in the mayhem somehow :D
And portland is about 100KM or less from the site, I know we have a jar of ash that my mother and I collected from the front yard, I think everybody living in portland at the time has a jar or canister of the stuff shoved in some closet somewhere.
wow ? so the donkeys and horses somehow have the keys to the universe ?
[B]neigh ?
wow ? so the donkeys and horses somehow have the keys to the universe ? [/B][/QUOTE]
Wouldn't Shrek like to know? ;)
[url]http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/mshfigs.html[/url]
I'm going to make these images as to allow for greater ease of viewing, so...
Take this time vs. depth plot of the last ten years...
[img]http://spike.geophys.washington.edu/SEIS/PNSN/HELENS/MSHFIGS/timedep.gif[/img]
...and compare to this time vs. depth plot, 1980-1998
[img]http://www.ess.washington.edu/SEIS/PNSN/HELENS/mshtimedep8098.gif[/img]
Very interesting indeed. (note to E.T.: That site has stolen my interest for a good while now. Thanks for the link! :D)
[B]Threw shit that far? Wow - volcano's must be the world's toilet! :p [/B][/QUOTE]That was small coughing.
Krakatau's eruption with total amount of released energy near couple hundred megatons spreaded pumice to area about 300 000 square miles.
[url]http://www.irfamedia.com/lampung/krakatau.htm[/url]
[url]http://www.volcanolive.com/krakatau1883.html[/url]
[url]http://whyfiles.org/031volcano/krakatau.html[/url]
[url]http://en.wikipedia.org/wiki/Krakatau[/url]
[quote]Near Sumatra, the Sunda Straits were clogged with so much debris that it looked like solid ground. Relief ships were unable to reach coastal communities like Telok Betong for weeks. Over the ensuing months, storms and high-tides would disperse thick banks of floating pumice beyond the Straits, into the Java Sea and Indian Ocean. Ships thousands of kilometers from Krakatau would report huge fields of this floating debris for months after the eruption.
About 2000 of the corpses in southern Sumatra had severe burns, indicating that they had been scorched to death, peresumably from pyroclastic flows. Although the behavior of pyroclastic flows and surges over water is poorly contrained by direct observations, the evidence suggests that they can travel great distances over open water. One compeling feature of the Krakatau eruption is that the pyroclastic flows appear to have travelled an incredible 40 km across the Sunda Straits, where they remained hot enough to cause the burn-related fatalities on Sumatra. These same flows, however, were also recorded by several ships located at greater distances. On August 27, the Louden (see above) was located ~65 km north-northeast of Krakatau when it was struck by severe winds and tephra, and the W.H. Besse was located at ~80 km east-northeast of Krakatau when it was hit by hurricane-force winds, heavy tephra, and the strong smell of sulfur.[/quote][url]http://www.geology.sdsu.edu/how_volcanoes_work/Krakatau.html[/url]
[quote]The renewed activity in May 1883 culminated in four gigantic explosions on August 26 and 27 of the same year. On the afternoon of August 26, 1883, (27 August local date) at 17: 07 Greenwich time (GMT), the first of these four violent explosions begun. A black cloud of ash was initially observed. It rose 17 miles (27 kilometers) above Krakatoa. In the morning of the next day, on August 27, 1883, at 05:30, 06:44 and 10:02 GMT, three more violent eruptions occurred. It was the paroxysmal eruption which occurred at 10:02 which blew away the northern two-thirds of the island. This was the most severe violent volcanic explosion on Earth in modern times. The explosion was followed by the collapse of the unsupported volcanic chambers of Krakatoa forming the huge underwater caldera. It was this explosion and collapse of Krakatoa that generated catastrophic tsunami waves as high as 37 meters. (120 ft.) that caused havoc and destruction in the Sunda Strait.
...
The total energy released by the four main events of the 1883 eruption was equivalent to 200 megatons of TNT. Most of this energy was released by the third paroxysmal explosion which has been estimated to be equivalent to an explosion of 150 megatons of TNT.[/quote][url]http://www.drgeorgepc.com/Vocano1883Krakatoa.html[/url]
And this was also just small backyard campfire.
[[url]http://www.drgeorgepc.com/Vocano1883Krakatoa.html[/url]]The Taupo eruption was a complex series of events. The first phases of the eruption produced a series of five pumice and ash fall deposits over a wide area of the central North Island, especially east of Taupo and beyond Napier into Hawke Bay. The eruption culminated with a large and very energetic pyroclastic flow that devastated an area of about 20,000 square kilometres and filled all the major river valleys of the central North Island with pumice and ash.[/http://www.drgeorgepc.com/Vocano1883Krakatoa.html][url]http://www.gns.cri.nz/what/earthact/volcanoes/nzvolcanoes/taupoprint.htm[/url]
[[url]http://www.drgeorgepc.com/Vocano1883Krakatoa.html[/url]]The 181AD Taupo eruption is unusual in several ways.
it produced an eruption column 50km high -- twice as high as the 1980 Mt St Helens eruption column.
it was the most violent eruption in the world in the past 5000 years.[/http://www.drgeorgepc.com/Vocano1883Krakatoa.html][url]http://www.essencenz.com/teko_history.html[/url]
[url]http://www.minerals.co.nz/jago/background.html[/url]
[url]http://www.extremescience.com/BiggestVolcano.htm[/url]
Toba's eruption which nearly exterminated mankind covered much bigger area:
[[url]http://www.drgeorgepc.com/Vocano1883Krakatoa.html[/url]]The volume of the youngest eruption is estimated at 2,800 cubic km, making the eruption the largest in the Quaternary. Pyroclastic flows covered an area of at least 20,000 square km. Up to 1200 feet (400 m) of Young Toba Tuff is exposed in the walls of the caldera. On Samosir Island the tuff is more than 1800 feet (600 m) thick. Ash fall from the eruption covers an area of at least 4 million square km (about half the size on the continental United States).[/http://www.drgeorgepc.com/Vocano1883Krakatoa.html][url]http://volcano.und.nodak.edu/vwdocs/volc_images/southeast_asia/indonesia/toba.html[/url]
[url]http://www.fact-index.com/l/la/lake_toba.html[/url]
And you have one in your back yard:
[url]http://volcano.und.nodak.edu/vwdocs/volc_images/north_america/yellowstone.html[/url]
[url]http://www.solcomhouse.com/yellowstone.htm[/url]
[url]http://exodus2006.com/yellow.htm[/url]
[url]http://exodus2006.com/supervol.html[/url]
[img]http://exodus2006.com/yellow_files/image002.jpg[/img]
[img]http://exodus2006.com/yelloqs.jpg[/img]
[img]http://exodus2006.com/ashvolume.jpg[/img]
Mount Mazama is now called [url=http://volcano.und.nodak.edu/vwdocs/volc_images/north_america/crater_lake.html]Crater Lake[/url]. :D
Whe one of these "real" volcanoes erupt shit really hits the fan!
[QUOTE][i]Originally posted by Tyvar [/i]
[B]...I think everybody living in portland at the time has a jar or canister of the stuff shoved in some closet somewhere. [/B][/QUOTE]And if which have got wet are now more like cement.
Right in my Backyard literally... ;)
I'm currently working on a 3D Model of the area... here's a wip:
(The upper left oval feature is Mono Lake, and the oval shaped depression with the Magma plume underneath it in the middle right is Long Valley Caldera)
[IMG]http://oakhurst.net/~alien/MISC/LongValleyCaldera.jpg[/IMG]
Long Valley Caldera a 15- by 30-km oval-shaped depression located 20 km south of Mono Lake along the east side of the Sierra Nevada in east-central California. This area of eastern California has produced numerous volcanic eruptions over the past 3 million years, including the massive caldera-forming eruption 760,000 years ago. The most recent eruption occurred just 250 years ago in Mono Lake at the north end of Mono-Inyo Craters volcanic chain.
Some links:
[url]http://wrgis.wr.usgs.gov/fact-sheet/fs108-96/[/url]
[url]http://lvo.wr.usgs.gov/[/url]
[url]http://www.wovo.org/1203_14.htm[/url]
Anyways most geologist think it would be a small eruption where only the caldara would be affected (effected? can never remember which ones to use).
[EDIT]The domb is rising [url]http://abcnews.go.com/wire/US/ap20040929_851.html[/url][/EDIT]
magnitude - What scale are you using?, There are two scales if I remember right.
[quote]The Long Valley caldera was produced by a catastrophic eruption about 730,000 years ago. The roof above the magma chamber collapsed, forcing 150 cubic miles (600 cubic km) of rhyolitic magma to the surface in the form of Plinian ash columns and associated air falls and ash flows.[/quote]Much smaller than Toba or Yellowstone.
[img]http://volcano.und.nodak.edu/vwdocs/volc_images/north_america/california/dist_of_bishop.gif[/img][img]http://volcano.und.nodak.edu/vwdocs/volc_images/north_america/california/CrssSecLVmap.gif[/img]
[i]Many of the eruptions in the Inyo Craters chain were phreatic eruption. These explosive eruptions produced numerous craters.
Eruptions at the Mono-Inyo Craters volcanic field occurred at 500-year intervals over the past 2,000-3,000 years.[/i]
[img]http://volcano.und.nodak.edu/vwdocs/Hopson/Hopson4.gif[/img][img]http://lvo.wr.usgs.gov/gallery/images/30714277-079_med.jpg[/img]
[img]http://vulcan.wr.usgs.gov/Imgs/Jpg/LongValley/inyo.jpg[/img]
[img]http://lvo.wr.usgs.gov/gallery/images/32022545-048_large.jpg[/img]
What a beautiful place, doesn't it?
[url=http://www.jpl.nasa.gov/radar/sircxsar/mammoth2.html][img]http://www.jpl.nasa.gov/radar/sircxsar/sc-mamm2.gif[/img][/url]
[url]http://www.geology.wisc.edu/~jadestar/caldera.html[/url][/url]
[url]http://www.seismo.berkeley.edu/~battag/LVO_GIS/intro.html[/url]
;)
Yellowstone does hold the title of King of the Super Volcanoes (Calderas) though!
I find the image above showing the millions of years of history of the Snake River plain and it's caldera forming eruptions fascinating...
;)
*runs away before hes torn several new arses*
[B]you bloody Americans... you cant even do volcanoes in 'small' :D:D:D[/B][/QUOTE]
What's wrong with big?
Don't forget also New Zealand has own one under Lake Taupo.
Actually Toba in Sumatra was bigger:
[img]http://zyx.org/Fig641.gif[/img]
[quote]The Mount Toba eruption is dated to approximately 71,000 years ago. Volcanic ash from Mount Toba can be traced north-west across India, where a widespread terrestrial marker bed exists of primary and reworked airfall ash, in beds that are commonly 1 to 3, and occasionally 6 meters [18 feet] thick.
Volcanic Winter, and Differentiation of Modern Humans
Mount Toba's eruption is marked by a 6 year period during which the largest amount of volcanic sulphur was deposited in the past 110,000 years. This dramatic event was followed by 1000 years of the lowest ice core oxygen isotope ratios of the last glacial period. In other words, for 1000 years immediately following the eruption, the earth witnessed temperatures colder than during the Last Glacial Maximum at 18-21,000 years ago.
[url]http://www.bradshawfoundation.com/evolution/[/url][/quote]
[url=http://www.ece.auckland.ac.nz/~gbig005/gallery/iros04/114_1487]Here's one for you[/url], Jack.
[B]As I recall, Taupo is the biggest eruption in something like 100,000 years. I think Krakatoa is next.[/B][/QUOTE]
Nope, in that timescale Toba wins clearly, and it might have been biggest eruption in couple million years.
But Taupo's eruption is one of the biggest eruptions after last ice age.
Mount Mazama/Crater lake might be pretty close.
[url=http://vulcan.wr.usgs.gov/Volcanoes/CraterLake/description_crater_lake.html][img]http://vulcan.wr.usgs.gov/Imgs/Jpg/CraterLake/crater_lake_aerial.jpg[/img][/url]
[quote]The 181AD Taupo eruption
This eruption took place from a vent or vents near the Horomatangi Reefs, now submerged on the eastern side of Lake Taupo. The eruption lasted between several days and several weeks and produced a sequence of pumice deposits that blanketed the landscape east of Taupo. In total about 100km3 was erupted.
At the climax of this eruption, about 30km3 of pumice, ash and rock fragments was erupted in only a few minutes and travelled horizontally as a liquid flow, moving at speeds estimated at between 600-900kmh. It crossed every obstacle in its path except the top of Mt Ruapehu.
it produced an eruption column 50km high -- twice as high as the 1980 Mt St Helens eruption column.
it was the most violent eruption in the world in the past 5000 years.
Taupo volcano represents a major scientific challenge in that its activity is so variable. In the last 50,000 years, it has had eruptions that vary in volume from 0.05km3 (slightly larger than a typical Ruapehu eruption) to over 800km3.
Taupo is the most frequently active and productive rhyolite volcano in the world.
the Oruanui eruption of 26,500 years ago produced enough material to build three Ruapehu-sized cones.
[url]http://www.essencenz.com/teko_history.html[/url][/quote]
When comparing amount of erupted material Tambora is close to Taupo and many times bigger than Krakatau but in "explosiveness" Krakatau, Tambora and Thira/Santorini are propably in "same scale".
[img]http://www.wordiq.com/knowledge/images/thumb/9/90/300px-Santorini.jpg[/img]
[quote]After a series of warning earthquakes that were alarming enough for all the residents to pack up and move out, the eruption created a 100 to 150m high tsunami that devastated the north coast of Crete, 70km (45 miles) away.
[url]http://www.wordiq.com/definition/Thira[/url][/quote]
[url]http://www.geology.sdsu.edu/how_volcanoes_work/santorini.html[/url]
[url]http://www.decadevolcano.net/santorini/santorini.htm[/url]
[B]Nope, in that timescale Toba wins clearly, and it might have been biggest eruption in couple million years.
But Taupo's eruption is one of the biggest eruptions after last ice age.
Mount Mazama/Crater lake might be pretty close.
[img]http://vulcan.wr.usgs.gov/Imgs/Jpg/CraterLake/crater_lake_aerial.jpg[/img][/url]
[/B][/QUOTE]
Been there, Done That!
Beware the squirrels there, they have been playing too much GTA, I'll see if I cant get the picture scanned in to show you what I mean :D