This is a preliminary UCB moment tensor solution for the event located 103 km WNW of Arcata, CA; 41.179N 125.237W; Z=2.5km; ML=4.1; (USGS/UCB Joint Notification System) on February 18, 2003 at 14:44:24 (UTC). Other information about this event can be viewed at: http://earthquake.usgs.gov/recenteqsUS/Quakes/nc51125941.htm Reviewed by: Dreger UCB Seismological Laboratory Inversion method: complete waveform Stations used: HOPS JCC YBH Berkeley Moment Tensor Solution Best Fitting Double-Couple: Mo = 2.39E+22 Dyne-cm Mw = 4.22 Z = 11 km Plane Strike Rake Dip NP1 313 165 87 NP2 44 3 75 Principal Axes: Axis Value Plunge Azimuth T 2.390 13 267 N 0.000 75 122 P -2.390 8 359 Event Date/Time: February 18, 2003 at 14:44:24 (UTC) Event ID: nc51125941 Moment Tensor: Scale = 10**22 Dyne-cm Component Value Mxx -2.334 Mxy 0.129 Mxz -0.368 Myy 2.270 Myz -0.508 Mzz 0.065 -- -- -------- P -------- ----------- ----------- ----------------------------- ###---------------------------### ######------------------------##### #########---------------------####### ############------------------######### ##############---------------########## ##################----------############# # ################-------############## # T ##################---################ # ##################################### ######################---################ ###################-------############# #################-----------########### #############----------------######## ##########--------------------##### ######-------------------------## #---------------------------- ------------------------- ------------------- -------