This is a preliminary UCB moment tensor solution for the event located 11 km S of Tres Pinos, CA (36.696N 121.329W; Z=5.9 km; ML4.0; USGS/UCB Joint Notification System) on July 3, 2001 at 19:02:50UTC. A Mw4.2 and depth of 11 km were obtained from long-period waves recorded by BDM, BKS, JRSC, MHC and PKD. Best Fitting Double-Couple: Mo = 2.05E+22 Dyne-cm Mw = 4.17 Z = 11 km Plane Strike Rake Dip NP1 47 -13 86 NP2 138 -176 77 Principal Axes: Axis Value Plunge Azimuth T 2.050 6 93 N 0.000 76 211 P -2.050 12 2 Best regards, Douglas Dreger Berkeley Seismological Laboratory Berkeley Moment Tensor Solution Event Date/Time: prel Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -1.954 Mxy -0.177 Mxz -0.428 Myy 2.016 Myz 0.212 Mzz -0.063 --- - --------- P ------- ------------ ---------- #---------------------------- ####---------------------------## ######------------------------##### ########---------------------######## ##########------------------########### ###########----------------############ ##############------------############### ###############---------################# #################-----################ ##################--################## T ##################--################## ###############------################## #############----------################ #########---------------############# ######-------------------########## ###-----------------------####### ---------------------------## ------------------------- ------------------- ------- Lower Hemisphere Equiangle Projection