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Fig. 2. | Earth, Planets and Space

Fig. 2.

From: Spatial distribution of similar aftershocks of a large inland earthquake, the 2000 Western Tottori earthquake, in Japan

Fig. 2.

Example of the analysis of similar aftershocks. (a) Hypocenter distribution of earthquakes reexamined manually and determined using the double-difference method (plusses) projected on the fault plane. The azimuth and the dip of the fault normal are 234° and 0°, respectively. Circles represent the source radius estimated by the circular crack model with a constant static stress drop of 3 MPa. (b) Band-pass filtered (1–8 Hz) waveforms of the vertical component recorded at the wt53 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) Location of the source fault (dotted rectangle with the solid line as the upper edge) (Iwata and Sekiguchi, 2002) and the station wt53. A star shows the average epicenter of these similar aftershocks.

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