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Originally posted by Mushussu
reply to post by violet
"Scientists once believed that an earthquake at one location could not trigger earthquakes at distant sites. That belief was shattered in 1992 when the magnitude-7.3 Landers earthquake in California's Mojave Desert triggered a swarm of quakes more than 800 miles away at Yellowstone, as well as other temblors near Mammoth Lakes, Calif., and Yucca Mountain, Nev."
Thank you ,Thank you for reposting this
best ,
Mushussu
First up is volcanologist Dr. R.B. Trombley of the International Volcano Research Centre: What does the earthquake swarm mean? It is our opinion, and in agreement with Dr. Robert Smith of the University of Utah, that the current events are more of a major seismic event rather than a major volcanic event. The Alert Status of Yellowstone continues, at this time, to remain at the Green Alert Level. We do not anticipate the Alert Level to be raised at this time. Given the current data, might the swarm be a prelude to a major seismic event ? It could be but the swarming is too "isolated", i.e., it is near the lake area only basically. What would be worrisome signs that that we might be headed to a major volcanic event ? Much greater magnitude earthquakes, over a larger area of the caldera.The caldera is approx. 32 mi long by 8 miles wide. I believe the gratest quake so far has only been a 3.9 and all of the 'quakes so far have been from 1 to 10 km of depth. I also talked to a top Hawaii-based volcanologist who was relucatant to go into specifics on the record since the scientist had only web data to go on, unlike the folks at the YVO. But I think these comments are pertinent: Bob Smith, who is a seismologist and a great one, is a real straight shooter and is going to tell folks what he thinks, when he has enough information to think something. Ditto for Jake Lowenstern of the USGS. So I believe them when they say that they don't really know at this point what this swarm portends as Yellowstone is very seismically active. ... The odds of a big caldera forming eruption at Yellowstone are really infinitesimal during our lifetime.
At 11:32 this morning, a 3.5 magnitude earthquake was reported 38 miles east southeast of West Yellowstone, Mont., in Yellowstone National Park — the latest in a swarm of earthquakes that has hit the area in the past week. The 3.5 tremor was followed this afternoon by a 3.2 magnitude quake at 12:40 p.m. and a 3.0 temblor at 1:15 p.m. The swarm of more than 500 tremors is the largest series of back-to-back quakes to hit the area in years, according to scientists. Today's quakes came on the heels of a series of tremors on New Year's Day, including a 3.0 at 6:30 p.m. and a 3.1 at 6:21 p.m. "The December 2008 earthquake sequence is the most intense in this area for some years," said the Yellowstone Volcano Observatory. "No damage has been reported within Yellowstone National Park, nor would any be expected from earthquakes of this size." According to the observatory, Yellowstone seismicity increased significantly in December because of what it described as an "energetic earthquake swarm" that began Dec. 27. The swarm is occurring beneath the northern part of Yellowstone Lake in the park. The largest of the quakes, according to the observatory, was a magnitude 3.9 at 10:15 p.m. on Dec. 27. Some of the larger earthquakes have been felt by park employees and guests, according to the observatory. The observatory was created as a partnership of the U.S. Geological Survey, Yellowstone National Park and the University of Utah. It monitors long-term volcanic and earthquake activity in the Yellowstone National Park region.
Professor Robert B. Smith, a geophysicist at the University of Utah and one of the leading experts on earthquake and volcanic activity at Yellowstone, said that the swarm is of keen interest to scientists. "It's not business as usual," said Smith. "This is a large earthquake swarm, and we've recorded several hundred. We are paying careful attention. This is an important sequence." Smith noted that beginning in 2004, there was "accelerated uplift of the Yellowstone Caldera" that covered the entire caldera. In 2007, Smith and his University of Utah colleagues said the current rise in the caldera was "unprecedented" but concluded that because there were no major earthquakes or "earthquake swarms" accompanying the uplift, they found "little indication that the volcano is moving toward an eruption." The last major earthquake swarm was in 1985 and lasted three months, Smith told The Denver Post. The Yellowstone Plateau, which comprises Yellowstone National Park, is one of the largest super-volcanoes in the world and has gone through three volcanic cycles spanning two million years that included some of the world's largest-known eruptions. Through 5 p.m. Dec. 31, the swarm had included 12 events of magnitude 3.0 to 3.9 and approximately 20 of 2.5 to 2.9, with a total of 400 quakes large enough to be located.
Originally posted by humanaqurian
I wish I could find the info on the relation between the indonesian quake in 2004 and yellowstone.
Originally posted by sageturkey
Originally posted by Mushussu
reply to post by violet
"Scientists once believed that an earthquake at one location could not trigger earthquakes at distant sites. That belief was shattered in 1992 when the magnitude-7.3 Landers earthquake in California's Mojave Desert triggered a swarm of quakes more than 800 miles away at Yellowstone, as well as other temblors near Mammoth Lakes, Calif., and Yucca Mountain, Nev."
Thank you ,Thank you for reposting this
best ,
Mushussu
And another quote from the USGS pertaining to Yellowstone and other earthquakes:
"A series of local earthquake swarms was observed, and clear changes in geyser activity occurred immediately following local arrival of seismic waves from the 2002 Denali fault, Alaska, earthquake (M=7.9) in the Yellowstone National Park area, 3100 km from the epicenter. Beginning within hours of the arrival of surface waves, the YVO network located more than 250 earthquakes in the first days after the Denali event."
Originally posted by pantangele
reply to post by SpadeofAces
At the risk of this post falling into its own criticism, I just waded through ten pages of absolute garbage. Quality and not quantity, please! There is a ton of data already in this thread so if you're new here, do some digging before rehashing topics from a hundred pages ago. Let's reserve posts for new and relevant events only. This connecting of all dots stuff without any substance is killing the thread... As is the conspiracy nonsense.
Originally posted by dodadoom
Originally posted by pantangele
reply to post by SpadeofAces
At the risk of this post falling into its own criticism, I just waded through ten pages of absolute garbage. Quality and not quantity, please! There is a ton of data already in this thread so if you're new here, do some digging before rehashing topics from a hundred pages ago. Let's reserve posts for new and relevant events only. This connecting of all dots stuff without any substance is killing the thread... As is the conspiracy nonsense.
I agree, however conspiracy is what it is. That has already been dealt with also in this thread. Make up your own mind, or else it means nothing anyway to you and you basically believe what you're told, so don't worry about it.