This is a preliminary UCB moment tensor solution for the event located 8 km NNE of The Geysers, CA; 38.867N 122.788W; Z=4.2km; ML=4.3; (USGS/UCB Joint Notification System) on October 20, 2006 at 17:00:08. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc40190077.php Reviewed by: Ved UCB Seismological Laboratory Inversion method: complete waveform Stations used: CVS GASB ORV P01C Q03C Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 9.88E+22 Dyne-cm Mw = 4.60 Z = 5 Plane Strike Rake Dip NP1 254 -39 68 NP2 1 -153 54 Principal Axes: Axis Value Plunge Azimuth T 9.880 8 310 N 0.000 46 49 P -9.880 43 212 Event Date/Time: October 20, 2006 at 17:00:08 Event ID: nc40190077 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx 0.218 Mxy -7.182 Mxz 5.092 Myy 4.101 Myz 1.532 Mzz -4.319 ####--- ############------- ################--------- #################---------- # T ##################----------- ## ###################----------- #########################------------ ###########################------------ #####################------############ ################-------------############ ###########------------------############ ########---------------------############ #####------------------------############ ###-------------------------############# ---------------------------############ ------------ ------------############ ----------- P -----------############ ---------- -----------########### ----------------------########### -------------------########## ----------------######### -----------######## ----### Lower Hemisphere Equiangle Projection