This is a preliminary UCB moment tensor solution for the event located 5 km ESE of Geysers; 38.786N 122.754W; Z=1.2km; ML=4.2; (USGS/UCB Joint Notification System) on May 9, 2005 at 22:37:39 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc40174680.htm Reviewed by: HELLWEG UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS MHC ORV WDC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 3.76E+22 Dyne-cm Mw = 4.35 Z = 5 km Plane Strike Rake Dip NP1 161 -168 84 NP2 70 -6 78 Principal Axes: Axis Value Plunge Azimuth T 3.760 4 295 N 0.000 77 187 P -3.760 13 26 Event Date/Time: May 9, 2005 at 22:37:39 UTC Event ID: nc40174680 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -2.235 Mxy -2.832 Mxz -0.612 Myy 2.397 Myz -0.598 Mzz -0.163 ------- ###------------- ######------------- P --- #########------------ ----- ###########---------------------- #############---------------------- ############----------------------- T #############----------------------- #############---------------------## ##################-----------------###### ##################-------------########## ###################---------############# ####################---################## ##################--##################### ###########---------################### ---------------------################## --------------------################# --------------------############### --------------------############# -------------------########## ------------------####### ----------------### -------