Seismic activity in the vicinity of Mt. Usuzan (epicenter distribution chart, by time period (recalculated hypocenter))
V.HUVO: Used only during the period 2000/3/29/11:02 - 2000/4/1/22:34.
HU.NAK, HU.MIT, V. MUSU: There are survey values from 2000/4/4, but they were not used to determine the hypocenter.
Japan Meteorological Agency