National Research Institute for Earth Science / Seismological Society of Japan / Japanese Society for Planetary Sciences / S. Hiratsuka and T. Sato Department of Earth and Environmental Sciences / Hirosaki University / Disaster Prevention / Geodetic Society of Japan / Geospatial Information Authority of Japan / National Research Institute for Earth Science and Disaster Prevention / Volcanological Society of Japan / Ministry of Education / Society of Geomagnetism and Earth / /