Post by Paddy by Grace on Feb 3, 2010 19:24:36 GMT -7
Yellowstone might go on first stage alert soon.
www.freerepublic.com/focus/f-news/2443122/posts#comment
Since January 17, 2010 Yellowstone has had the second largest swarm ever recorded. The swarms have been steady at about 10 miles in depth and they have subsided a few days ago.
In the past two days the depth has raised up to around 7 miles and in the past couple hours quakes vastly increased.
www.quake.utah.edu/helicorder/ymr_webi.htm
www.seis.utah.edu/req2webdir/recenteqs/Maps/111-44.html
Remember this doesn’t mean we will see an eruption and it most likely means a normal volcano. It is very unlikely we will see a caldera eruption.
But these changes are significant and cannot be over looked
Some history:
Since the most recent giant caldera-forming eruption, 640,000 years ago, approximately 80 relatively nonexplosive eruptions have occurred. Of these eruptions, at least 27 were rhyolite lava flows in the caldera, 13 were rhyolite lava flows outside the caldera and 40 were basalt vents outside the caldera. Some of the eruptions were approximately the size of the devastating 1991 Pinatubo eruption in the Philippines, and several were much larger. The most recent volcanic eruption at Yellowstone, a lava flow on the Pitchstone Plateau, occurred 70,000 years ago.
article #2 .......
Swarm of tiny earthquakes at Yellowstone puts scientists on alert
www.dallasnews.com/sharedcontent/dws/news/nation/stories/DN-yellowstone_01nat.ART.State.Edition1.13cda6e.html
10:48 AM CST on Monday, February 1, 2010
The New York Times DENVER – In the last two weeks, more than 100 mostly tiny earthquakes a day, on average, have rattled a remote area of Yellowstone National Park in Wyoming, putting scientists who monitor the park's strange and volatile geology on alert.
Researchers say that for now, the earthquake cluster – the second-largest ever recorded in the park – is more a cause for curiosity than alarm. The quake zone, about 10 miles northwest of the Old Faithful geyser, has shown little indication, they said, of building toward a larger event, like a volcanic eruption of the type that last ravaged the Yellowstone region tens of thousands of years ago.
The area is far from any road or community, and the park is relatively empty in winter.
Swarms of small quakes, including a significant swarm last year, are relatively common.
But at a time when the disastrous earthquake in Haiti has refocused global attention on the earth's immense store of tectonic energy, scientists say that the Yellowstone swarm, if only because of its volume, bears close observation: As of Sunday, there had been 1,608 quakes since Jan. 17.
"We're not seeing a pattern that is really discernible yet," said Dr. Henry Heasler, a coordinating scientist for the Yellowstone Volcano Observatory, a joint venture of Yellowstone, the U.S. Geological Survey and the University of Utah.
Heasler said that plans were in place to intensify the level of observation in case the swarm continued for a long time or got larger.
www.freerepublic.com/focus/f-news/2443122/posts#comment
Since January 17, 2010 Yellowstone has had the second largest swarm ever recorded. The swarms have been steady at about 10 miles in depth and they have subsided a few days ago.
In the past two days the depth has raised up to around 7 miles and in the past couple hours quakes vastly increased.
www.quake.utah.edu/helicorder/ymr_webi.htm
www.seis.utah.edu/req2webdir/recenteqs/Maps/111-44.html
Remember this doesn’t mean we will see an eruption and it most likely means a normal volcano. It is very unlikely we will see a caldera eruption.
But these changes are significant and cannot be over looked
Some history:
Since the most recent giant caldera-forming eruption, 640,000 years ago, approximately 80 relatively nonexplosive eruptions have occurred. Of these eruptions, at least 27 were rhyolite lava flows in the caldera, 13 were rhyolite lava flows outside the caldera and 40 were basalt vents outside the caldera. Some of the eruptions were approximately the size of the devastating 1991 Pinatubo eruption in the Philippines, and several were much larger. The most recent volcanic eruption at Yellowstone, a lava flow on the Pitchstone Plateau, occurred 70,000 years ago.
article #2 .......
Swarm of tiny earthquakes at Yellowstone puts scientists on alert
www.dallasnews.com/sharedcontent/dws/news/nation/stories/DN-yellowstone_01nat.ART.State.Edition1.13cda6e.html
10:48 AM CST on Monday, February 1, 2010
The New York Times DENVER – In the last two weeks, more than 100 mostly tiny earthquakes a day, on average, have rattled a remote area of Yellowstone National Park in Wyoming, putting scientists who monitor the park's strange and volatile geology on alert.
Researchers say that for now, the earthquake cluster – the second-largest ever recorded in the park – is more a cause for curiosity than alarm. The quake zone, about 10 miles northwest of the Old Faithful geyser, has shown little indication, they said, of building toward a larger event, like a volcanic eruption of the type that last ravaged the Yellowstone region tens of thousands of years ago.
The area is far from any road or community, and the park is relatively empty in winter.
Swarms of small quakes, including a significant swarm last year, are relatively common.
But at a time when the disastrous earthquake in Haiti has refocused global attention on the earth's immense store of tectonic energy, scientists say that the Yellowstone swarm, if only because of its volume, bears close observation: As of Sunday, there had been 1,608 quakes since Jan. 17.
"We're not seeing a pattern that is really discernible yet," said Dr. Henry Heasler, a coordinating scientist for the Yellowstone Volcano Observatory, a joint venture of Yellowstone, the U.S. Geological Survey and the University of Utah.
Heasler said that plans were in place to intensify the level of observation in case the swarm continued for a long time or got larger.