This is a preliminary UCB moment tensor solution for the event located 1 km ESE from The Geysers, CA; 38.796N 122.794W; Z=1.7km; ML=4.5; (USGS/UCB Joint Notification System) on April 24, 2007 at 21:08:28 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51181154.php Reviewed by: RHIE and FORD UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS,CVS,MHC,ORV, and WDC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 4.62E+22 Dyne-cm Mw = 4.38 Z = 5 Plane Strike Rake Dip NP1 342 -160 82 NP2 249 -9 70 Principal Axes: Axis Value Plunge Azimuth T 4.620 8 114 N 0.000 69 3 P -4.620 20 207 Event Date/Time: April 24, 2007 at 21:08:28 UTC Event ID: nc51181154 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -2.485 Mxy -3.350 Mxz 1.044 Myy 2.921 Myz 1.258 Mzz -0.436 ------- ####--------------- ########----------------- ###########------------------ ##############------------------- ###############-------------------- #################-------------------- ###################-----------######### ####################--################# #################----#################### #############---------################### ##########------------################### #######----------------################## #####-------------------################# ##---------------------############ # ------------------------########### T # -----------------------########### ----------------------############# -------- -----------########### ------ P -----------######### ---- -----------####### ----------------### ------- Lower Hemisphere Equiangle Projection