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Table 1 Summary of settings in waveform inversion analysis

From: Source rupture processes of the foreshock and mainshock in the 2016 Kumamoto earthquake sequence estimated from the kinematic waveform inversion of strong motion data

  Foreshock Mainshock
Origin timea 2016/04/14 21:26:34.43 2016/04/16 01:25:05.47
Epicentera 32.7417°N, 130.8087°E 32.7545°N, 130.7630°E
Hypocenter deptha 11.39 km 12.45 km
Fault segment   #1 #2
Strike/dip 212°/89° 205°/72° 235°/65°
Rake angle variation −164° ± 45° −142° ± 45° −142° ± 45°
Length 14 km 14 km 28 km
Width 13 km 18 km 18 km
Subfault size 1 km × 1 km 2 km × 2 km
Number of subfaults 182 63 126
Number of time windows 5 9
Duration/time-shift of time window 1.0 s/0.5 s 1.0 s/0.5 s
Target frequency range 0.05–1 Hz 0.05–0.5 Hz
Resampling of data 10 Hz 5 Hz
Number of stations 13 15
  1. aOrigin time and hypocenter were taken from the JMA unified earthquake catalog