This is a preliminary UCB moment tensor solution for the event located 1 km N of Geysers; 38.81N 122.80E; Z=11km; ML=3.7; (USGS/UCB Joint Notification System) on July 20, 2007 at 17:50:20. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc511884307.php Reviewed by: CAO UCB Seismological Laboratory Inversion method: complete waveform Stations used: BKS, CVS, SAO Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 9.09E+21 Dyne-cm Mw = 3.91 Z = 11 Plane Strike Rake Dip NP1 61 -41 75 NP2 164 -160 51 Principal Axes: Axis Value Plunge Azimuth T 9.090 15 117 N 0.000 47 224 P -9.090 39 14 Event Date/Time: July 20, 2007 at 17:50:20 Event ID: nc511884307 Moment Tensor: Scale = 10**21 Dyne-cm Component Value Mxx -3.339 Mxy -4.776 Mxz -5.378 Myy 6.320 Myz 0.951 Mzz -2.982 ------- ###---------------- #####-------------------- ######----------------------- #######----------- ------------ ########----------- P ------------- #########----------- -------------# ##########-------------------------#### ##########-----------------------###### ###########---------------------######### ###########-------------------########### ###########----------------############## ############------------################# ############---------#################### ############----################# ### ############-#################### T ### #####--------################### ## -------------###################### -------------#################### -------------################ -------------############ -------------###### ------- Lower Hemisphere Equiangle Projection