This is a preliminary UCB moment tensor solution for the event 48 km WNW of Punta Gorda, CA (40.463N 124.863W; Z=15.7km; ML=4.1; USGS/UCB Joint Notification System) on May 22, 2001 at 00:40:39UTC. A Mw=3.9 and depth of 18 km were obtained from long-period waves recorded at YBH and HOPS. Best Fitting Double-Couple: Mo = 6.93E+21 Dyne-cm Mw = 3.86 Z = 18 km Plane Strike Rake Dip NP1 130 175 90 NP2 220 0 85 Principal Axes: Axis Value Plunge Azimuth T 6.926 4 85 N 0.000 85 310 P -6.926 4 175 Best regards, Douglas Dreger UCB Seismological Laboratory Berkeley Moment Tensor Solution Event Date/Time: prel Moment Tensor: Scale = 10**21 Dyne-cm Component Value Mxx -6.795 Mxy 1.198 Mxz 0.462 Myy 6.795 Myz 0.388 Mzz 0.000 ------- ------------------- ------------------------- ---------------------------## #--------------------------###### ####----------------------######### #######------------------############ ###########-------------############### #############----------################ ################------################# ##################---################## T ###################-################### #################------################## ################---------################ ##############------------############# ############----------------########### ##########--------------------####### #######------------------------#### #####---------------------------# ##--------------------------- ------------------------- ---------- ------ ---- P --------------------------------------------------------------------------