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originally posted by: Patriotsrevenge
a reply to: LDragonFire
Why would California and Alaska be related? They are on the ring of fire but that is about it. The whole earth is waking up seismically and the volcanoes even more.
originally posted by: Patriotsrevenge
a reply to: LDragonFire
Why would California and Alaska be related? They are on the ring of fire but that is about it. The whole earth is waking up seismically and the volcanoes even more.
originally posted by: LDragonFire
originally posted by: Patriotsrevenge
a reply to: LDragonFire
Why would California and Alaska be related? They are on the ring of fire but that is about it. The whole earth is waking up seismically and the volcanoes even more.
Isn't both areas on the same Pacific plate?
And I asked the question, that means I don't know. Right?
originally posted by: LDragonFire
originally posted by: Patriotsrevenge
a reply to: LDragonFire
Why would California and Alaska be related? They are on the ring of fire but that is about it. The whole earth is waking up seismically and the volcanoes even more.
Isn't both areas on the same Pacific plate?
And I asked the question, that means I don't know. Right?
David Shelly, a seismologist and geophysicist with the USGS told the Mammoth Times that the quakes appear to come from the release of some carbon dioxide gas and water deep in the earth into existing cracks or faults in the ground under the Eastern Sierra.
“This fluid moves episodically into cracks or faults in the crust,” he said. “We think these quakes were triggered by this movement but driven by existing tectonics.”
Hydrovolcanic eruptions are volcanic eruptions that are generated from the interaction of magma and/or lava with water. Magma rising through the Earth’s crust carries with it a great deal of heat, or thermal energy. If this hot magma comes in contact with water (or ice), either on the surface or in the subsurface, the water can be quickly converted to the gaseous state (steam) via the transfer of thermal energy
Maar volcanoes are simple circular depressions surrounded by gently sloping beds of highly fragmented pyroclastic material (Figures 3 and 4). Maars form when rising magma comes into contact with subsurface water (an aquifer for example) and subsequent phreatic explosions excavate a hole in the country rock. Maars are typically easy to distinguish from other hydrovolcanic features because they excavate the subsurface and leave craters in the ground.
In June 1979 small- to moderate-magnitude swarm activity began in a area southeast of Mammoth Lakes along the boundary of the Long Valley caldera. Seismic activity in the swarm area included only events of magnitude < 4.5 until the initial earthquake of the Mammoth Lakes sequence on May 25 (Chris Cramer, CDMG, personal communication, 1980). Source
Ontake was thought to be inactive until October 1979 when it underwent a series of eruptions, ejecting 200,000 tons of ash in total.Source
Mount St. Helens is most notorious for its catastrophic eruption on May 18, 1980, at 8:32 a.m. PDT,Source