Occasionally, numerous earthquakes are detected in a relatively short period of time, an event known as an earthquake swarm. Some geoscientists hypothesize that the Yellowstone hotspot is the effect of an interaction between local conditions in the lithosphere and upper mantle convection. Contrary to some media reports, Yellowstone is not 'overdue' for a supereruption. Volcanic eruptions sometimes empty their stores of magma so swiftly that the overlying land collapses into the emptied magma chamber , forming a geographic depression called a caldera. Nevertheless, according to Brian Wilson of the Jet Propulsion Laboratory , a completed project might trigger, instead of prevent, an eruption. In , more than 3, earthquakes were measured over a period of several months.
Nevertheless, according to Brian Wilson of the Jet Propulsion Laboratory , a completed project might trigger, instead of prevent, an eruption. NASA proposed introducing water at high pressure 10 kilometers underground. At least a dozen of these eruptions were so massive that they are classified as supereruptions. Over 20 large craters have been produced in the past 14, years, resulting in such features as Mary Bay, Turbid Lake , and Indian Pond which was created in an eruption about BC. The volcanic eruptions, as well as the continuing geothermal activity, are a result of a great cove of magma located below the caldera's surface. Smaller steam explosions occur as well: Hydrothermal explosion Studies and analysis may indicate that the greater hazard comes from hydrothermal activity which occurs independently of volcanic activity. If the expansion results in further relief of pressure, for example, by blowing crust material off the top of the chamber, the result is a very large gas explosion. The Yellowstone Volcano Observatory issued a statement on its website stating, Although fascinating, the new findings do not imply increased geologic hazards at Yellowstone, and certainly do not increase the chances of a 'supereruption' in the near future. More than 70 smaller swarms were detected between and On March 30, , at 6: Contrary to some media reports, Yellowstone is not 'overdue' for a supereruption. The hotspot appears to move across terrain in the east-northeast direction, but in fact the hotspot is much deeper than terrain and remains stationary while the North American Plate moves west-southwest over it. It is suggested that the volcanism may be caused by upwellings from the lower mantle resulting from water-rich fragments of the Farallon plate descending from the Cascadia subduction region, sheared off at a subducted spreading rift. Volcanism at Yellowstone Yellowstone sits on top of four overlapping calderas. The results suggested that cooling the magma chamber by 35 percent would be enough to forestall such an incident. As the Yellowstone hotspot traveled to the east and north, the Columbia disturbance moved northward and eventually subsided. Geological Survey, University of Utah and National Park Service scientists with the Yellowstone Volcano Observatory maintain that they "see no evidence that another such cataclysmic eruption will occur at Yellowstone in the foreseeable future. Volcanic eruptions sometimes empty their stores of magma so swiftly that the overlying land collapses into the emptied magma chamber , forming a geographic depression called a caldera. Together these eruptions have helped create the eastern part of the Snake River Plain from a once-mountainous region. According to the researchers, these maps could help predict when another supereruption occurs. The circulating water would release heat at the surface, possibly in a way that could be used as a power source. If the pressure is released to a sufficient degree by some geological shift, then some of the gases bubble out and cause the magma to expand. With 1, small earthquakes between January 17, , and February 1, , this swarm was the second-largest ever recorded in the Yellowstone Caldera. Recurrence intervals of these events are neither regular nor predictable. Some geoscientists hypothesize that the Yellowstone hotspot is the effect of an interaction between local conditions in the lithosphere and upper mantle convection.
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