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the most powerful in 30 years
reply to post by TrueAmerican
I read your other thread and it was quite informative. If it is magma though - wouldn't the signature look like a harmonic tremor? Or is it the case that it could be magma, having pushed hard enough to break rock, and not produce a HT?
And if magma broke through something - if this is their finding, what does that mean? It sounds really bad but I'm sure there are a couple of different things this could indicate so wanted your thoughts on it if possible.
I can't help but think that people grossly over-estimate the power of even 'super' volcanoes. The Earth is a very big place.
Q: How much advance notice would there be of an eruption?
A: The science of forecasting a volcanic eruption has significantly advanced over the past 25 years. Most scientists think that the buildup preceding a catastrophic eruption would be detectable for weeks and perhaps months to years. Precursors to volcanic eruptions include strong earthquake swarms and rapid ground deformation and typically take place days to weeks before an actual eruption. Scientists at the Yellowstone Volcano Observatory* (YVO) closely monitor the Yellowstone region for such precursors. They expect that the buildup to larger eruptions would include intense precursory activity (far exceeding background levels) at multiple spots within the Yellowstone volcano. As at many caldera systems around the world, small earthquakes, ground uplift and subsidence, and gas releases at Yellowstone are commonplace events and do not reflect impending eruptions.
*The YVO is a collaborative effort between the US Geological Survey, the University of Utah, and YNP to monitor and study the Yellowstone Volcano. Congress has given the USGS the responsibility of volcano hazard assessment, and YNP assists the USGS in their volcano monitoring effort.
Q: How will the park get the word out if there is an eruption?
A: The park would communicate accurate and timely information to park visitors, park employees, concessioners, surrounding communities, media outlets, and other interested parties through the park's 24-hour Communications Center; news releases; established emergency response programs; and through notification of appropriate interagency, state and local government agencies.
Q: Where would it be safe to be during an eruption?
A: For the most likely type of volcanic eruption in Yellowstone, everywhere would be safe except in the immediate vicinity of the advancing lava flow. In the highly improbable event of a large catastrophic eruption, the greater the distance from the eruptive center, the safer it would be. It is impossible to know the effects of the eruption without guessing at the explosivity of the highly unlikely eruption and the total amount of the material erupted.
Q: Would the public know about a possible eruption?
A: Yes. Scientists continuously monitor volcano activity in Yellowstone and share that information through news releases, web sites, etc. Current real-time-monitoring data are online at volcanoes.usgs.gov...
The earthquake was the largest at the national park since Feb. 22, 1980. Read more: www.upi.com...