This is a preliminary UCB moment tensor solution for the event located 25 km W of Petrolia, CA; 40.312N 124.584W; Z=19.8km; ML=3.7; (USGS/UCB Joint Notification System) on January 24, 2007 at 13:42:52 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51178004.php Reviewed by: DREGER UCB Seismological Laboratory Inversion method: complete waveform Stations used: GASB HUMO JCC WDC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 5.05E+22 Dyne-cm Mw = 4.41 Z = 18 Plane Strike Rake Dip NP1 187 25 85 NP2 95 175 65 Principal Axes: Axis Value Plunge Azimuth T 5.050 21 54 N 0.000 65 197 P -5.050 14 318 Event Date/Time: January 24, 2007 at 13:42:52 UTC Event ID: nc51178004 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -1.126 Mxy 4.461 Mxz 0.097 Myy 0.789 Myz 2.143 Mzz 0.337 ------# ------------####### --------------########### - ------------############# --- P -----------################ ---- -----------########### ### -------------------########### T #### -------------------############ ##### -------------------#################### --------------------##################### --------------------##################### ##-----------------###################### #####--------------###################### ##########---------##################---- #################-###########---------- ##################--------------------- ################--------------------- ###############-------------------- ##############------------------- ############----------------- ##########--------------- #######------------ #------ Lower Hemisphere Equiangle Projection