Science Alert  December 8, 2022 An obvious but key requirement for an eruption is the presence of magma. This magma also needs to be distributed so that it can mobilize and erupt as a coherent body. A key issue for eruption hazard assessment is to ascertain how much magma is below the surface and where. Researchers at UC Davis modeled seismic data to image melt beneath the Yellowstone Caldera. They concluded that more melt is present than had been recognized, and it is located at shallow depths in the crust. But the melt fraction they estimated is substantially lower than […]