[The events which have date, time and magnitude in the figure are M5.0 or greater earthquakes, or M4.0 or greater earthquakes that have a maximum seismic intensity of 5 Lower, or greater. The above mentioned event(s) fall under one or more of the following categories; M6.0 or greater earthquakes, or M4.0 or greater earthquakes that have maximum seismic intensity of 5 Lower, or greater.]
N: total number of events in the figure
Japan Meteorological Agency
Ministry of Education, Culture, Sports, Science and Technology
(Japan Meteorological Agency data include data from the National Research Institute for Earth Science and Disaster Prevention and related universities.)
[Seismic Activity for February 2011 (March 9, 2011)]