epicenter (reference point)
  03/09/27 11:33  (UT)   49.98 N  87.90 E     18.4 km   7.3

 (Strike, Dip, Rake) = (126, 80, 174)/(217, 84, 10)
 Seismic moment, Mo = 8.0x10**19 Nm  (Mw = 7.2)
 Source duration,  T = 20 s
 Fault area,  S = 40 km x 20 km
 Dislocation, D (maximum) = 4.3 m
 Stress drop  DELTA sigma = 2.5 Mo / S**1.5 = 8.8 MPa