Scientists detect new movement in Three Sisters volcanoes
..."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."
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...
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...
https://www.usgs.gov/observatories/cvo
And the full program:
https://www.usgs.gov/programs/VHP
https://www.usgs.gov/media/images/deformation-near-south-sister-gps-data-2001-2017