. This is a preliminary UCB moment tensor solution for the event centered in
Bolinas, CA (37.91N 122.69W; Z=6.9; ML=5.0; USGS/UCB Joint Notification
System) on August 18, 1999 at 18:06:18UTC.  An average Mw4.7 was obtasined
from long-period surface wave spectra and complete long-period waveforms.
A depth of 8 km was obtained from long period complete waveforms.  This
event is a REVERSE mechanism parallel to the San Andreas Fault.
 
 Best Fitting Double-Couple:
 Complete Three-Comp Waveforms          Surface Wave Amp and Phase Spectra
    Mo = 7.25E+22 Dyne-cm               1.6e+23
    Mw = 4.54                           4.8
    Z  = 8 km                           6 km
    Plane   Strike   Rake   Dip         Strike   Rake   Dip
     NP1      115      69    49         121     86      51
     NP2      325     112    45         307     95      39
 Principal Axes:
    Axis    Value   Plunge   Azimuth
      T     7.250      74      317
      N     0.000      16      129
      P    -7.250       2      220

Best regards,
Douglas Dreger
Hrvoje Tkalcic
UC Berkeley Seismological Laboratory
 
                                               
                                               
 
 Berkeley Moment Tensor Solution
 
 Event Date/Time: prel
 
 Moment Tensor: Scale = 10**22 Dyne-cm
    Component   Value
       Mxx     -4.003
       Mxy     -3.828
       Mxz      1.574
       Myy     -2.699
       Myz     -1.147
       Mzz      6.703
 
                    -------                    
              -------------------              
           #####--------------------           
         #############----------------         
       ##################---------------       
      #####################--------------      
     ########################-------------     
    -##########################------------    
    --##########################-----------    
   ----#############   ##########-----------   
   -----############ T ###########----------   
   ------###########   ############---------   
   -------##########################--------   
   ---------########################--------   
    ----------#######################------    
    -------------####################------    
     ----------------################----#     
      ----------------------#######--####      
       --   ------------------------####       
          P ------------------------##         
            -----------------------#           
              -------------------              
                    -------