Prediction of Volcanic Eruptions
Eruptions of Sakurajima volcano have continued at the summit crater since 1955. In 2006, the Showa crater on the east flank resumed eruption after a dormant period of 58 years and the eruptive activity has increased since 2009. For prediction of volcanic eruptions, the eruption process, the mechanism of volcanic explosions and the shallow magma system of the volcano have been investigated using several kinds of data collected by seismometers, tilt and strain meters, infrasonic microphones, TV and infrared cameras and other geophysical and geochemical observations. Seismic and deformation data are practically used for the evaluation of short-term volcanic activity and the real-time prediction of volcanic explosions. The ground deformation data have revealed accumulation of magma beneath Aira caldera, north of the volcano.