This is a preliminary UCB moment tensor solution for the event located 3 km ESE of Geysers, CA (38.791N 122.774W; Z=5.km; ML=3.5; USGS/UCB Joint Notification System) on April 18, 2002 at 11:35:40.0 UTC. Other information about this event can be viewed at: http://ncedc.org/recenteqs/Quakes/nc51117758.html Reviewed by: dreger UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS BDM JRSC ORV Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 9.97E+21 Dyne-cm Mw = 3.97 Z = 5. km Plane Strike Rake Dip NP1 71 -16 85 NP2 162 -175 74 Principal Axes: Axis Value Plunge Azimuth T 9.970 8 118 N 0.000 73 234 P -9.970 15 26 Event Date/Time: April 18, 2002 at 11:35:40.0 UTC Event ID: nc51117758 Moment Tensor: Scale = 10**21 Dyne-cm Component Value Mxx -5.451 Mxy -7.670 Mxz -2.831 Myy 5.928 Myz 0.091 Mzz -0.477 ------- ###---------------- ######------------ ---- ########------------ P ------ ##########------------ -------- ###########------------------------ #############------------------------ ##############------------------------- ##############-----------------------## ################-----------------######## ################-------------############ #################-------################# #################--###################### #############-----####################### #####-------------##################### ------------------################# # ------------------################ T ------------------############### ------------------############### -----------------############ ----------------######### ---------------#### -------