This is a preliminary UCB moment tensor solution for the event located 8 km NNE of The Geysers; 38.867N 122.783W; Z=2.7km; ML=3.5; (USGS/UCB Joint Notification System) on October 20, 2006 at 23:31:39 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc40190151.php Reviewed by: Ved UCB Seismological Laboratory Inversion method: complete waveform Stations used: CVS GASB MCCM Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 6.50E+21 Dyne-cm Mw = 3.81 Z = 5 Plane Strike Rake Dip NP1 240 -65 55 NP2 21 -121 42 Principal Axes: Axis Value Plunge Azimuth T 6.500 7 312 N 0.000 20 45 P -6.500 69 205 Event Date/Time: October 20, 2006 at 23:31:39 UTC Event ID: nc40190151 Moment Tensor: Scale = 10**21 Dyne-cm Component Value Mxx 2.203 Mxy -3.522 Mxz 2.533 Myy 3.333 Myz 0.357 Mzz -5.536 ####### #################-- ######################--- #######################---- # T #######################------ ## ####################----###--- ###################-----------####### ################---------------######## #############-------------------####### ############--------------------######### ##########----------------------######### ########------------------------######### #######---------- -----------########## #####------------ P -----------########## ###------------- ----------########## ###-------------------------########### #-------------------------########### ------------------------########### ---------------------############ -----------------############ ------------############# -----############## ####### Lower Hemisphere Equiangle Projection