This is a preliminary UCB moment tensor solution for the event located 13 km SE of Parkfield, CA; 35.806N 120.349W; Z=6.7km; ML=4.7; (USGS/UCB Joint Notification System) on September 28, 2004 at 17:24:15 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc51147900.htm Reviewed by: Templeton UCB Seismological Laboratory Inversion method: complete waveform Stations used: KCC MHC SAO Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 1.45E+23 Dyne-cm Mw = 4.74 Z = 5 km Plane Strike Rake Dip NP1 330 -167 83 NP2 238 -7 77 Principal Axes: Axis Value Plunge Azimuth T 1.446 4 104 N 0.000 75 358 P -1.446 14 195 Event Date/Time: September 28, 2004 at 17:24:15 UTC Event ID: nc51147900 Moment Tensor: Scale = 10**23 Dyne-cm Component Value Mxx -1.192 Mxy -0.665 Mxz 0.307 Myy 1.270 Myz 0.187 Mzz -0.079 ------- ------------------- ###---------------------- #######---------------------- ##########----------------------- ############----------------------- ###############----------------###### #################----------############ ##################-----################ ####################-#################### ##################---#################### ###############-------################### #############----------################## ##########--------------############## #######-----------------############# T #####--------------------############ ##-----------------------############ -------------------------########## -------------------------######## --------- ------------##### ------- P ------------### ---- ------------ -------