Here is the source time function for the 970207_TONGA   event.
 If you have any questions or comments, please contact
         tanioka@umich.edu
 
                         Nazli Nomanbhoy
                         Yuichiro Tanioka and Larry Ruff
                         University of Michgan
 
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970207_TONGA                            
 LOCATION     -19.759  LAT.    -173.406  LONG.                          
 ORIGIN TIME=   8 HOUR 41 MIN 14.0 SEC GMT   (NEIC Ms 6.1)
 Focal mechanism (USGS)
      strike  dip   rake        strike  dip   rake
      323.    26.    76.        159.    65.    97.
 Depth  33. km (the best depth)
 Number of stations:  5
 The Maximum moment rate (10**20 Nm/s) =    9.03980E-03
 One "space" represents    1.00000 sec
 Moment of the main pulse:  0.075 (10**20 Nm) at 38.0sec (Mw 6.6)
 
   \                                      
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|...\                                     
|...|                                     
|...|                              -\     
|...|                             |.|     
|...|                             /.|     
|...|             \            \ /...\    
|...|            /|           /./....|    
|...|           |.|          /.......|    
|...|           |..\\       |........|    
|....\          /...|  \    |.........\   
|....|         |....| ||    /..........   
|....|        \|....| ||   |...........   
|....| \     |||.....\||   |...........   
/====|||=====|||======/|===/===========   
      /|     / /        \ |               
        \   |           | /               
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0        10        20        30sec        
                                          
 
 Numerical values of source time function
 Sampling dt:  1.0sec
 X10**16 Nm/sec
  0.00 82.30 81.40 90.40 57.92 17.10 -3.52  3.38-10.11-22.65
-12.82-21.29-14.51 -6.13  7.71 -2.83 16.98 32.96 37.78 23.87
 20.98  4.92  0.49 16.66 -5.35-14.21 -9.52 -0.08 14.61 27.01
 33.65 36.18 33.23 37.63 41.98 50.92 51.50 38.21 18.50
(STF Catalog Listing, go to: "http://www.geo.lsa.umich.edu/SeismoObs/STF.html")