This is a preliminary UCB moment tensor solution for the event located 5 km SSE of Parkfield, CA; 35.860N 120.414W; Z=9.2km; ML=4.1; (USGS/UCB Joint Notification System) on May 22, 2007 at 11:34:12 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51182151.php Reviewed by: Ved UCB Seismological Laboratory Inversion method: complete waveform Stations used: CMB HAST HELL KCC SAO FMP Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 1.25E+22 Dyne-cm Mw = 4.00 Z = 8 Plane Strike Rake Dip NP1 322 176 89 NP2 52 1 86 Principal Axes: Axis Value Plunge Azimuth T 1.250 4 277 N 0.000 86 128 P -1.250 2 7 Event Date/Time: May 22, 2007 at 11:34:12 UTC Event ID: nc51182151 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -1.211 Mxy -0.303 Mxz -0.037 Myy 1.208 Myz -0.082 Mzz 0.003 ---- P ---------- ------ ------------------------- ###-------------------------- #######-------------------------- #########-----------------------### ###########--------------------###### ##############----------------######### ###############-------------########### ################---------############## T #################-----################# ###################-################### ####################--################### #################-------################# ##############----------############### ###########---------------############# ########------------------########### ####----------------------######### ---------------------------###### --------------------------### ------------------------- ------------------- ------- Lower Hemisphere Equiangle Projection