This is a preliminary UCB moment tensor solution for the event located 13 km WSW of Petrolia, CA; 40.281N 124.426W; Z=20.8km; ML=4.7; (USGS/UCB Joint Notification System) on July 19, 2006 at 11:41:43 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51172658.php Reviewed by: DREGER UCB Seismological Laboratory Inversion method: complete waveform Stations used: JCC ORV WDC YBH Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 3.53E+23 Dyne-cm Mw = 4.97 Z = 30 Plane Strike Rake Dip NP1 193 7 83 NP2 102 173 83 Principal Axes: Axis Value Plunge Azimuth T 3.532 10 57 N 0.000 80 237 P -3.532 0 327 Event Date/Time: July 19, 2006 at 11:41:43 UTC Event ID: nc51172658 Moment Tensor: Scale = 10**23 Dyne-cm Component Value Mxx -1.515 Mxy 3.158 Mxz 0.320 Myy 1.411 Myz 0.505 Mzz 0.104 ------- -------------###### P -------------######### -- ------------############ ------------------############### -------------------############ # -------------------############# T ## --------------------############# ### -------------------#################### ##------------------##################### #######------------###################### #############------###################### ##################---#################### ##################---------------######## #################---------------------- ################----------------------- ###############---------------------- ##############--------------------- #############-------------------- ##########------------------- ########----------------- #####-------------- ------- Lower Hemisphere Equiangle Projection