This is a preliminary UCB moment tensor solution for the event located 18 km WNW of Parkfield, CA; 35.9505N 120.6253W; Z=0.6km; ML=5.1; (USGS/UCB Joint Notification System) on September 30, 2004 at 18:54:28 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc51149146.htm Reviewed by: Dolenc UCB Seismological Laboratory Inversion method: complete waveform Stations used: KCC, MHC, PACP, SAO, ISA, and SBC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 2.66E+23 Dyne-cm Mw = 4.92 Z = 11. km Plane Strike Rake Dip NP1 232 7 89 NP2 142 179 83 Principal Axes: Axis Value Plunge Azimuth T 2.723 5 97 N -0.128 83 237 P -2.594 4 7 Source Composition: Type Percent DC 90.6 CLVD 9.4 Iso 0.0 Event Date/Time: September 30, 2004 at 18:54:28 UTC Event ID: nc51149146 Moment Tensor: Scale = 10**23 Dyne-cm Component Value Mxx -2.506 Mxy -0.617 Mxz -0.223 Myy 2.625 Myz 0.242 Mzz -0.118 ---- P ---------- ------ ------------------------- ###-------------------------- ######--------------------------- ########-----------------------#### ##########--------------------####### ############-----------------########## #############--------------############ ###############----------################ ################--------################# ################------################ ################------################ T ###############--------############### ############-----------################ ##########--------------############### #######-----------------############# ####---------------------########## --------------------------####### -------------------------#### ------------------------- ------------------- -------