This is a preliminary UCB moment tensor solution for the event located 92 km WNW of Ferndale, CA (40.739N 125.334W; Z=4.8km; ML=5.2; USGS/UCB Joint Notification System) on January 13, 2001 at 13:08:41 (UTC). A Mw5.5 and depth of 18 km were obtained from long period waves recorded by stations YBH, WDC and HOPS. Best Fitting Double-Couple: Mo = 1.83E+24 Dyne-cm Mw = 5.47 Z = 18 km Plane Strike Rake Dip NP1 126 170 80 NP2 218 10 80 Principal Axes: Axis Value Plunge Azimuth T 1.830 14 82 N 0.000 76 263 P -1.830 0 172 Best regards, Douglas Dreger UCB Seismological Laboratory Berkeley Moment Tensor Solution Moment Tensor: Scale = 10**24 Dyne-cm Component Value Mxx -1.763 Mxy 0.482 Mxz 0.063 Myy 1.655 Myz 0.428 Mzz 0.109 ------- ------------------- ------------------------- -------------------------#### -------------------------######## ##----------------------########### ####-------------------############## #######----------------################ #########------------################## ############---------############### ## ##############-----################# T ## #################-################## ## ################---###################### ###############-------################### #############-----------############### ###########----------------############ #########--------------------######## #######------------------------#### #####---------------------------- ##--------------------------- ------------------------- ----------- ----- ----- P