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Earthquake Hazards Program

Magnitude 7.6 SCOTIA SEA

2003 August 04 04:37:20 UTC

Preliminary Earthquake Report

U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver

USGS Fast Moment Tensor Solution

 03/08/04 04:37:19.99
 SCOTIA SEA                      
 Epicenter: -60.553  -43.494
 MW 7.1

 USGS MOMENT TENSOR SOLUTION
 Depth  35         No. of sta: 12
 Moment Tensor;   Scale 10**19 Nm
   Mrr=-5.48       Mtt= 3.66
   Mff= 1.84       Mrt=-0.34
   Mrf=-1.25       Mtf= 1.67
  Principal axes:
   T  Val=  4.73  Plg= 5  Azm=148
   N        0.96       8       57
   P       -5.69      81      273

 Best Double Couple:Mo=5.2*10**19
  NP1:Strike=247 Dip=40 Slip= -78
  NP2:        51     51      -100
                                      
                                      
               #######                
          #################           
        #####################         
      #########################       
    ############--------------##-     
   #########-------------------##-    
   #######---------------------###    
  ######----------------------#####   
  ####---------   -----------######   
  ###---------- P ----------#######   
  ##-----------   ---------########   
  ##---------------------##########   
   --------------------###########    
   ------------------#############    
    -------------################     
      ###################   ###       
        ################# T #         
          ###############             
               #######                
                                      

Note: This is a large, complex,
shallow event.  The scalar
moment and MW are probably
underestimated.

Moment Tensor Solution

Explanation of Parameters
Current USGS Fast Moment Tensor Solutions
USGS E-mail Notification Services
Source Parameter Search

For more information, contact Stuart Sipkin sipkin@usgs.gov


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