Posted on Feb 3, 2022
Scientists detect new movement in Three Sisters volcanoes
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Scientists are seeing new signs that magma is moving deep within the Three Sisters volcanic complex in Oregon’s Cascade Range.
Equipment used by the U.S. Geological Survey to monitor volcanic activity has detected short bursts of tiny earthquakes across a 12-mile area where the ground has been lifting at a faster pace.
Jon Major, scientist in charge at the Cascades Volcano Observatory, said the activity is likely coming from pulses of magma moving about four miles underground.
“There’s no imminent threat,” he said. “Our interpretation is it’s probably related to ongoing small inputs of magma deep underground.”
If the volcano were close to erupting, Major said, the magma would be breaking more rock, generating bigger earthquakes, releasing gases and lifting the ground at a much faster pace.
“There would be a lot more signs that magma was making its way to the surface and poised for an eruption,” he said. “We’re not seeing any of that right now.”
The last time Three Sisters erupted was about 2,200 years ago. Major said it is likely to erupt again, but the latest activity is minimal compared to what scientists expect to see before an eruption.
Equipment used by the U.S. Geological Survey to monitor volcanic activity has detected short bursts of tiny earthquakes across a 12-mile area where the ground has been lifting at a faster pace.
Jon Major, scientist in charge at the Cascades Volcano Observatory, said the activity is likely coming from pulses of magma moving about four miles underground.
“There’s no imminent threat,” he said. “Our interpretation is it’s probably related to ongoing small inputs of magma deep underground.”
If the volcano were close to erupting, Major said, the magma would be breaking more rock, generating bigger earthquakes, releasing gases and lifting the ground at a much faster pace.
“There would be a lot more signs that magma was making its way to the surface and poised for an eruption,” he said. “We’re not seeing any of that right now.”
The last time Three Sisters erupted was about 2,200 years ago. Major said it is likely to erupt again, but the latest activity is minimal compared to what scientists expect to see before an eruption.
Scientists detect new movement in Three Sisters volcanoes
Posted from opb.org
Geology
Science
Posted >1 y ago
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PO3 Sheila Buchter
I was drilling in the reserves when Mt Saint Helens blew. I had problems breathing do to allergy to the sulfur in the cloud plume & in the ash. I had to wear a scarf over my nose & mouth at work since I worked outside at work.
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PO1 William "Chip" Nagel
..."There’s no imminent threat,” he said. “Our interpretation is it’s probably related to ongoing small inputs of magma deep underground.”
If the volcano were close to erupting, Major said, the magma would be breaking more rock, generating bigger earthquakes, releasing gases and lifting the ground at a much faster pace.
“There would be a lot more signs that magma was making its way to the surface and poised for an eruption,” he said. “We’re not seeing any of that right now.”
The last time Three Sisters erupted was about 2,200 years ago. Major said it is likely to erupt again, but the latest activity is minimal compared to what scientists expect to see before an eruption."
..."There’s no imminent threat,” he said. “Our interpretation is it’s probably related to ongoing small inputs of magma deep underground.”
If the volcano were close to erupting, Major said, the magma would be breaking more rock, generating bigger earthquakes, releasing gases and lifting the ground at a much faster pace.
“There would be a lot more signs that magma was making its way to the surface and poised for an eruption,” he said. “We’re not seeing any of that right now.”
The last time Three Sisters erupted was about 2,200 years ago. Major said it is likely to erupt again, but the latest activity is minimal compared to what scientists expect to see before an eruption."
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PO1 William "Chip" Nagel
MT. PINATUBO 1991: In the Path of the Killer Volcano
In the Path of a Killer Volcanoby Hal Holbrook, Rob Whittlesey, Noel Buckner, Documentary Guild., WGBH (Television station : Boston, Mass.), WGBH Video (Firm...
PO3 Sheila Buchter I Understand, I'm a Mt Pinatubo Survivor. https://www.youtube.com/watch?v=2YwYEPgJrfA
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PO1 William "Chip" Nagel - I have been watching the number of Volcano's around the globe that have been extremely active, and the one in your post is serious, but the one of most importance, in my view in the United States, is the Yellowstone Caldera...
Here's a quote:
"The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States. The caldera and most of the park are located in the northwest corner of Wyoming." Wikipedia
I share with you a link with more information:
https://www.usgs.gov/faqs/what-would-happen-if-supervolcano-eruption-occurred-again-yellowstone
Here's a quote:
"The Yellowstone Caldera, sometimes referred to as the Yellowstone Supervolcano, is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States. The caldera and most of the park are located in the northwest corner of Wyoming." Wikipedia
I share with you a link with more information:
https://www.usgs.gov/faqs/what-would-happen-if-supervolcano-eruption-occurred-again-yellowstone
What would happen if a "supervolcano" eruption occurred again at Yellowstone? | U.S. Geological...
If another large, caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate. Those parts of the surrounding states of Montana, Idaho, and Wyoming that are closest to Yellowstone would be affected by pyroclastic flows, while other places in the United States would be impacted byfalling...
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Interesting news. It would be better if the USGS spoke a little more about monitoring.
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CW4 Guy Butler
Here you go:
https://www.usgs.gov/observatories/cvo
And the full program:
https://www.usgs.gov/programs/VHP
https://www.usgs.gov/observatories/cvo
And the full program:
https://www.usgs.gov/programs/VHP
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SFC (Join to see)
CW4 Guy Butler - RP site was very on and off for me yesterday, it looks like it's 100% now. Thanks for the site, there were additional sites where I found some data that is interesting.
https://www.usgs.gov/media/images/deformation-near-south-sister-gps-data-2001-2017
https://www.usgs.gov/media/images/deformation-near-south-sister-gps-data-2001-2017
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