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Table 1. Parameters for the CMT inversion.

From: Spatial distribution and focal mechanisms of aftershocks of the 2011 off the Pacific coast of Tohoku Earthquake

Classification by amplitude magnitude

3.5 ≤ M < 5

5≤M <6

6 ≤ M excepting 12 events

12 large events

Epicentral distance for station selection (km)

10–300

100–400

100–500

500–900

Waveform lengths for the CMT inversion (s)

120

150

180

300

Pass-band of the filter (Hz)

0.02–0.05

0.02–0.05

0.02–0.05

0.005–0.02

Initial centroid time from origin time (s)

0

0

5

10–20