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Table 2 Conditions for double-difference hypocenter relocation

From: Application of cluster analysis based on waveform cross-correlation coefficients to data recorded by ocean-bottom seismometers: results from off the Kii Peninsula

  Phase Station type Number Root mean square of travel time residuals after relocation (s)
Events - - 1,284 -
Absolute travel time P On-land stations and OBSs 75,769 0.078
  S   109,616 0.103
Differential travel time from hypocenter list P On-land stations and OBSs 75,536 0.052
  S   123,236 0.080
Differential travel time from CC measurements P OBSs 5,036 0.017
  S   12,509 0.020