This is a preliminary UCB moment tensor solution for the event located 63 km W of Petrolia, CA; 40.392N 125.023W; Z=0.6km; ML=3.9; (USGS/UCB Joint Notification System) on December 17, 2006 15:13:40 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51176911.php Reviewed by: DREGER UCB Seismological Laboratory Inversion method: complete waveform Stations used: GASB HOPS HUMO JCC WDC YBH Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 3.57E+22 Dyne-cm Mw = 4.31 Z = 5 Plane Strike Rake Dip NP1 274 -159 90 NP2 184 0 69 Principal Axes: Axis Value Plunge Azimuth T 3.570 15 47 N 0.000 69 274 P -3.570 15 141 Event Date/Time: December 17, 2006 15:13:40 UTC Event ID: nc51176911 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -0.464 Mxy 3.300 Mxz 1.276 Myy 0.464 Myz 0.089 Mzz 0.000 -----## ----------######### ------------############# -------------################ --------------############## ## ---------------############## T ### ---------------############### #### ----------------####################### ---------------######################## ----------------######################### ----------------######################### ################-----#################### ################------------------------- ################------------------------- ###############------------------------ ###############------------------------ ##############----------------------- #############-------------- ----- ############-------------- P ---- ###########------------- -- #########---------------- #######------------ ##----- Lower Hemisphere Equiangle Projection