epicenter (reference point)
  03/09/26 04:50  (JST)   41.78 N  144.079 E     42 km   8.0

 (Strike, Dip, Rake) = (230, 20, 109)
 Seismic moment, Mo = 1.0x10**21 Nm  (Mw = 8.0)
 Source duration,  T = 40 s
 Fault area,  S = 90 km x 70 km
 Dislocation, D (maximum) = 5.8 m   D(mean) = 2.6 m
 Stress drop  DELTA sigma = 2.5 Mo / S**1.5 = 5.5 MPa