This is a preliminary UCB moment tensor solution for the event located 0 km NE of the Geysers, CA; 38.800N 122.8043W; Z=1.1km; ML=3.6; (USGS/UCB Joint Notification System) on May 20, 2003 at 16:50:42 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc51128216.htm Reviewed by: Dreger UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS CVS ORV WDC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 1.31E+22 Dyne-cm Mw = 4.04 Z = 5 (restrained) km Plane Strike Rake Dip NP1 346 136 79 NP2 86 15 47 Principal Axes: Axis Value Plunge Azimuth T 13.100 38 296 N 0.000 45 155 P -13.100 20 43 Event Date/Time: May 20, 2003 at 16:50:42 UTC Event ID: nc51128216 Moment Tensor: Scale = 10**21 Dyne-cm Component Value Mxx -4.542 Mxy -8.968 Mxz -0.297 Myy 1.133 Myz -8.622 Mzz 3.409 ------- #####-------------- #########---------------- ############----------------- ###############----------- ---- #################---------- P ----- ##################---------- ------ ####### ##########------------------- ####### T ###########------------------ ######## ###########------------------- #######################------------------ #######################-----------------# ########################---------------## --######################-------------#### ---####################----------###### -------#################------######### -----------############-############# ----------------------############# ---------------------############ -------------------########## ------------------####### ---------------#### -------