This is a preliminary UCB moment tensor solution for the event located 2 km ESE of Aromas, CA; 36:53N 121:38E; Z=8.5km; ML=4.5; (USGS/UCB Joint Notification System) on July 1, 2007 19:58:53 UTC. Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsus/Quakes/nc51183708.php Reviewed by: HELLWEG UCB Seismological Laboratory Inversion method: complete waveform Stations used: CMB MCCM MHC PACP PKD Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 3.06E+22 Dyne-cm Mw = 4.26 Z = 8 Plane Strike Rake Dip NP1 143 -174 88 NP2 53 -2 84 Principal Axes: Axis Value Plunge Azimuth T 3.060 3 278 N 0.000 84 161 P -3.060 6 8 Event Date/Time: July 1, 2007 19:58:53 UTC Event ID: nc51183708 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -2.915 Mxy -0.828 Mxz -0.277 Myy 2.938 Myz -0.191 Mzz -0.022 ----- ----------- P ----- -------------- -------- ###-------------------------- #######-------------------------- #########------------------------## ###########---------------------##### #############------------------######## ###############--------------########## ###############----------############## T #################------################ ##################---################## ####################-#################### ##################-----################## ##############---------################ ############-------------############## ########-----------------############ ####---------------------########## --------------------------####### -------------------------#### ------------------------- ------------------- ------- Lower Hemisphere Equiangle Projection