Here is the source time function for the 971019_Tonga   event.
 If you have any questions or comments, please contact
         tanioka@umich.edu
 
                         Yuichiro Tanioka and Larry Ruff
                         University of Michgan
 
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971019_Tonga                            
 LOCATION     -22.000  LAT.    -175.600  LONG.                          
 ORIGIN TIME=  15 HOUR 53 MIN 36.1 SEC GMT   (NEIC Ms 5.9)
 Focal mechanism (MTRF inversion, See URL address below):
      strike  dip   rake        strike  dip   rake
      274.    41.   114.         63.    53.    70.
 Depth  88. km (the best depth)
 Number of stations:  6
 The Maximum moment rate (10**20 Nm/s) =    3.20654E-03
 One "space" represents   0.400000 sec
 Moment of the main pulse:  0.010 (10**20 Nm) at 6.0 sec (Mw 6.0)
 
       \           
      |.-\         
      |..|         
      |..|         
      |..|         
      /...\        
     |.....\       
     /.....|       
    |......|       
    |......|       
    |.......\      
    |........\     
    |........|     
   \/........|     
  |..........|     
 \|..........|     
|||...........\    
|./............\   
|...............   
|...............   
/===============   
|    |    |    |
0    2    4    6 sec
                   
 
 Numerical values of source time function
 Sampling dt:  0.4sec
 X10**16 Nm/sec
  0.00  8.27  5.17 11.90 10.81 20.31 23.87 32.07 30.10 30.25
 23.85 22.81 16.10 13.74  5.82  4.73
(STF Catalog Listing, go to: "http://www.geo.lsa.umich.edu/SeismoObs/STF.html")
(MTRF Catalog List, go to: "http://www.geo.lsa.umich.edu/SeismoObs/MTRFs.html")