Appended figure2-4 Recent seismic activity, including small earthquakes IV (M 2 or greater, 1985 - 1994).
(Note) As hypocenter determination was not conducted for small earthquakes occurring inside the subducting Pacific Plate, the deep earthquakes in the figure are chiefly earthquakes that occurred inside the Philippine Sea Plate.
[Prepared data from Nagoya University, The University of Tokyo, Kyoto University, and Kochi University]
Shallow earthquakes with a hypocenter of 30 km or less in depth.
Deeper earthquakes with a hypocenter of over 30 km in depth.
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