This is a preliminary UCB moment tensor solution for the event located 118 km W of Petrolia, CA; 40.493N 125.657W; Z=11km; ML=3.9; (USGS/UCB Joint Notification System) on September 10, 2003 at 21:19:24 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc40146326.htm Reviewed by: Dreger UCB Seismological Laboratory Inversion method: complete waveform Stations used: HOPS JCC ORV YBH Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 2.08E+22 Dyne-cm Mw = 4.18 Z = 11 km Plane Strike Rake Dip NP1 360 -34 87 NP2 92 -176 56 Principal Axes: Axis Value Plunge Azimuth T 2.080 21 51 N 0.000 56 175 P -2.080 26 310 Event Date/Time: September 10, 2003 at 21:19:24 UTC Event ID: nc40146326 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx 0.014 Mxy 1.721 Mxz -0.095 Myy 0.120 Myz 1.158 Mzz -0.135 ---#### ----------######### -------------############ ---------------############## -----------------################ ----- ----------########## #### ------ P ----------########## T ##### ------- ----------########## ###### --------------------################### ---------------------#################### ---------------------#################### #--------------------#################### ###------------------###################- #####----------------################---- ########------------#############------ ###############-----######------------- ###################------------------ ##################----------------- #################---------------- ###############-------------- #############------------ ##########--------- ####---