Fig. 2

An example of the analyses of similar earthquakes. (a) The hypocenter distribution of earthquakes reexamined manually (gray pluses) and those determined by the double-difference (D.D) method (black pluses) projected on the fault plane. Circles show the source radius estimated by the circular crack model (Brune, 1970) with a constant stress drop. (b) Band-pass filtered (1–8 Hz) waveforms of the vertical component recorded at the TOGI station. The amplitude of each waveform is normalized to unity. The origin time (JST) and the magnitude are displayed at the bottom right of each waveform. (c) The location of the source fault (dotted rectangle with the solid line as the upper edge)(Horikawa, 2008) and the station TOGI. A small rectangle shows the area of (a).