This is a preliminary UCB moment tensor solution for the event located 8 km NNE of Alum Rock, CA; 37.432N 121.776W; Z=9.2km; ML=5.6; (USGS/UCB Joint Notification System) on October 31, 2007 at 3:04:54 (UTC). Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc40204628.php Reviewed by: Hellweg UCB Seismological Laboratory Inversion method: complete waveform Stations used: FARB CVS MCCM CMB PKD KCC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 1.85E+24 Dyne-cm Mw = 5.45 Z = 11 Plane Strike Rake Dip NP1 53 3 90 NP2 323 180 87 Principal Axes: Axis Value Plunge Azimuth T 1.850 2 278 N 0.000 87 53 P -1.850 2 188 Event Date/Time: October 31, 2007 at 3:04:54 (UTC) Event ID: nc40204628 Moment Tensor: Scale = 10**24 Dyne-cm Component Value Mxx -1.776 Mxy -0.509 Mxz 0.077 Myy 1.776 Myz -0.058 Mzz 0.000 ------- ------------------- ------------------------- ####------------------------- #######-------------------------- ##########----------------------### ############-------------------###### ###############--------------########## ###############-----------############ T #################------################ ##################---################## ######################################### ##################-----################## ################--------################# ############------------############### ##########----------------############# ######--------------------########### ###-----------------------######### ---------------------------###### --------------------------### ------------------------- ----- ----------- P ----- Lower Hemisphere Equiangle Projection