| http://www.w3.org/ns/prov#value | - The stored energy, however, may in part be of hydrodynamic origin due to heat provided by magma moving in reservoirs beneath the volcano or to the release of gas under pressure.Volcanoes and thermal fields that have been active during the past 10,000 years.Encyclop??dia Britannica, Inc.There is a clear correspondence between the geographic distribution of volcanoes and major earthquakes, particula
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