This is a preliminary UCB moment tensor solution for the event located
15km W of Portola, CA (39.893 N 120.638W; Z=10km; ML=5.1; USGS/UCB JOint
Notification System) on August 10, 2001 at 20:19:26UTC.
A Mw5.2 and depth of 24 km were obtained from long-period wave recorded
recorded by CMB, ORV, HOPS, POTR, and WDC.
 
 Best Fitting Double-Couple:
    Mo = 6.80E+23 Dyne-cm
    Mw = 5.19
    Z  = 24 km
    Plane   Strike   Rake   Dip
     NP1      235      -9    83
     NP2      326    -173    81
 Principal Axes:
    Axis    Value   Plunge   Azimuth
      T     6.800       1      281
      N     0.000      79       18
      P    -6.800      11      190

Best regards,

Douglas Dreger
UCB Seismological Laboratory
 
                                               
 
 Berkeley Moment Tensor Solution
 
 Event Date/Time: prel
 
 Moment Tensor: Scale = 10**23 Dyne-cm
    Component   Value
       Mxx     -6.101
       Mxy     -2.378
       Mxz      1.316
       Myy      6.357
       Myz      0.063
       Mzz     -0.256
 
                                               
                    -------                    
              -------------------              
           #------------------------           
         #####------------------------         
       #########------------------------       
      ############---------------------##      
     ##############----------------#######     
    #################-----------###########    
     #################-------##############    
   T ##################---##################   
     ##################--###################   
   ##################-----##################   
   ###############---------#################   
   #############------------################   
    ##########---------------##############    
    #######-------------------#############    
     ####----------------------###########     
      #-------------------------#########      
       --------------------------#######       
         -------------------------####         
           --------   -------------#           
              ----- P -----------              
                      -----                    
                                               
     Lower Hemisphere Equiangle Projection