Here is the source time function for the 971014_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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971014_Tonga                            
 LOCATION     -21.950  LAT.    -176.920  LONG.                          
 ORIGIN TIME=   9 HOUR 53 MIN 18.0 SEC GMT   (NEIC Ms 6.5)
 Focal mechanism ( Harvard CMT )
      strike  dip   rake        strike  dip   rake
       16.    77.  -106.        248.    21.   -40.
 Depth 175. km (the best depth)
 Number of stations: 12
 The Maximum moment rate (10**20 Nm/s) =   0.385868
 One "space" represents   0.400000 sec
 Moment of the main pulse:  3.380 (10**20 Nm) at 20.0sec (Mw 7.7)
 
                        -\                            
                       /..\                           
                      /....-\                         
                     |.......\                        
                     /.......|                        
                    |.........\                       
                    |..........\    \                 
                    /...........\  -.--\              
                   |............| /.....\             
                   /.............-......|             
                  |.....................|             
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                  /......................|            
                 |........................\           
                 /........................|           
    ---         /..........................\          
   |...--\     -............................\         
   /......\  //..............................\        
  /........--.................................--\     
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-/=================================================   
|         |         |         |         |         |  
0         4         8        12        16        20 sec
                                                      
 
 Numerical values of source time function
 Sampling dt:  0.4sec
 X10**18 Nm/sec
  0.00  0.83  3.27  6.52  8.84  9.68  9.33  8.55  8.04  7.44
  6.24  4.79  4.30  4.88  6.69  8.61  9.55 11.10 14.96 20.83
 25.80 31.00 34.91 36.55 37.99 38.59 37.27 35.30 35.35 33.46
 29.78 27.71 24.81 22.03 22.96 25.40 26.11 25.02 24.75 24.68
 22.33 18.15 13.92 10.55  7.41  5.28  4.05  3.36  3.17  1.93
  1.81
(STF Catalog Listing, go to: "http://www.geo.lsa.umich.edu/SeismoObs/STF.html")