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Table 1 Seismic reflection experiments in the Hokkaido Transect Project

From: Structural heterogeneity in and around the fold-and-thrust belt of the Hidaka Collision zone, Hokkaido, Japan and its relationship to the aftershock activity of the 2018 Hokkaido Eastern Iburi Earthquake

Profile 1998-Wa 1998-Ea 1999b 2000c
Source Vibrator x 4 + explosive Vibrator x 4 + explosive Explosive Vibrator x 4 + explosive
Shot interval (m) 200–300 200–300 ~1000 200–300
Charge size of explosive (kg) 100 100 40–700 100–300
Number of shots 50 + 1 24 + 1 28 161 + 4
Receiver interval (m) 50/150 50 50 50/300
Number of receivers 312 200 1055 1073
Profile length (km) 15 10 58 70
Sampling interval (ms) 4 4 4/10 4/10
Record length(s) 20/40 20/40 30 16/20/60
  1. aIwasaki et al. (2001)
  2. bRGES (2002a)
  3. cRGES (2002b)