Appended figure2-5 Recent seismic activity, including small earthquakes V (M 2 or greater, 1984 - January 1997).
(Note) In South Kyushu, a network of stations was successively arranged, beginning in 1994. Subsequently, the precision of hypocenter determinations improved. The detection ability in the Goto Islands, Iki, and Tsushima is low.
[Prepared using data from Kyushu University and Kagoshima University]
Shallow earthquakes with a hypocenter of 30 km or less in depth.
Deeper earthquakes with a hypocenter over 30 km in depth.
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