The Fuji cluster is named for Mt. Fuji on the island of Honshu, Japan.
Much of the seismicity is associated with the nearby Izu Peninsula. The
cluster includes the great Kanto earthquake of September 1, 1923 (8.0
Mw). The region was heavily instrumented even in the 1920s and the
location calibration is very robust. All events have depth control from
near-source and local-distance readings, and about half the events also
have teleseismic depth phases in generally good agreement. Most events
are observed at teleseismic distances.