This is a preliminary UCB moment tensor solution for the event located 18 km SSE of Tres Pinos, CA (36.641N 121.252W; Z=6.8km; ML=4.7; USGS/UCB Joint Notification System) on December 28, 2001 at 1:14:01UTC. Other information about this event can be viewed at: http://ncedc.org/recenteqs/Quakes/nc40129860.html Reviewed by: Pete Lombard UCB Seismological Laboratory Inversion method: complete waveform Stations used: BDM, BKS, CMB, JRSC, and MHC Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 9.49E+22 Dyne-cm Mw = 4.62 Z = 5 km Plane Strike Rake Dip NP1 321 -175 87 NP2 231 -3 85 Principal Axes: Axis Value Plunge Azimuth T 9.490 1 96 N 0.000 84 352 P -9.490 6 186 Event Date/Time: December 28, 2001 at 1:14:01UTC Event ID: nc40129860 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -9.200 Mxy -1.921 Mxz 0.902 Myy 9.287 Myz 0.328 Mzz -0.086 ------- ------------------- ------------------------- ###-------------------------- ######--------------------------# #########---------------------##### ############-----------------######## ##############-------------############ ################---------############## ##################-----################## ####################-#################### ###################--################## ################-------################ T ##############----------############### ###########--------------############## #########-----------------############# ######---------------------########## ###------------------------######## #--------------------------###### ---------------------------## --------- ------------- ------ P ---------- ----