This is a preliminary UCB moment tensor solution for the event located 3 km E of the Geysers, CA; 38.796N 122.767W; Z=2.0km; ML=3.8; (USGS/UCB Joint Notification System) on August 3, 2003 at 12:00:53 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc40145391.htm Reviewed by: Dreger UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS BDM ORV CMB WDC JCC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 2.18E+22 Dyne-cm Mw = 4.19 Z = 5 (restrained) km Plane Strike Rake Dip NP1 242 -29 66 NP2 345 -153 64 Principal Axes: Axis Value Plunge Azimuth T 2.180 1 294 N 0.000 53 26 P -2.180 37 203 Event Date/Time: August 3, 2003 at 12:00:53 UTC Event ID: nc40145391 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -0.821 Mxy -1.317 Mxz 0.980 Myy 1.601 Myz 0.368 Mzz -0.780 ------- ######------------- ###########-------------- ##############--------------- #################---------------- ###################---------------- ####################-------######### T ##################################### ################------############### ################----------############### #############-------------############### ##########-----------------############## ########-------------------############## ######---------------------############## ####-----------------------############ ##-------------------------############ ------------ -----------########### ----------- P -----------########## ---------- -----------######### ---------------------######## -------------------###### ---------------#### -------