The National Renewable Energy Laboratory's (NREL) map of potential geothermal resources across the U.S. shows the potential for development of deep enhanced geothermal systems (EGS), as well as identified hydrothermal resources. Color shading shows the potential for deep enhanced geothermal systems, or systems which use technology that is currently being developed to extract energy from dry rocks deep below the surface.
"Definitely. Many stratovolcanoes have a plumbing system of hot acid water that progressively breaks down hard rock to soft, clay-rich material. The volcano is gradually weakened, and large parts may suddenly fail. Resulting water-rich landslides are especially dangerous because they can occur without any volcanic or seismic warning.
There are many different kinds of hazards associated with volcanic eruptions, depending on the type of volcano and eruption. Some volcanoes typically produce highly explosive eruptions, such as in the subduction zones of Alaska and the Pacific northwest, and others produce less energetic eruptions, such as in Hawaii. Therefore, hazards detailed below are not necessarily relevant to every volcano.