Earthquake Off-shore of Kamaishi, Iwate Prefecture on January 11 (M4.7)
Upper left figure: Epicenter distribution of shallow earthquakes equal to or larger than M6.0 that occurred during 1926–1998. (from the 145th report of the Coordinating Committee for Earthquake Prediction)
Upper right figure: Epicenter distribution of micro earthquakes (h ≤ 60km) that occurred during 1995–1999. The arrow indicates the seismicity of the earthquake off-shore of Kamaishi. (from the 145th report of the Coordinating Committee for Earthquake Prediction)
Lower figure: Magnitude-time distribution of the clusters of earthquakes off-shore of Kamaishi, Iwate prefecture. The stars are events that are thought of as repeating earthquakes at the M4.9 level. The one on the far right is the recent event, which has become the 10th "Off-shore Kamaishi Earthquake". The period and the area of the plotted events are shown in the upper part of the figure. Events other than the M4.9 level earthquakes are shown only after 1976.
Tohoku University
[Seismic Activity for January 2008 (February 8, 2008)]