Here is the source time function for the 970719_Mexico  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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970719_Mexico                           
 LOCATION      15.840  LAT.     -98.195  LONG.                          
 ORIGIN TIME=  14 HOUR 22 MIN  4.8 SEC GMT   (NEIC Ms 6.2)
 Focal mechanism (  Harvard CMT )
      strike  dip   rake        strike  dip   rake
      283.    12.    81.        112.    78.    92.
 Depth  10. km (the best depth)
 Number of stations: 10
 The Maximum moment rate (10**20 Nm/s) =    1.75380E-02
 One "space" represents    1.00000 sec
 Moment of the main pulse:  0.174 (10**20 Nm) at 20. sec (Mw 6.8)
 
             \               
            |.\              
            /.|              
           |...\             
           |....\\           
           |.....|           
           /.....|           
          |.......\          
          |.......|          
          /.......|          
         /........|          
        |.........|          
        /..........\         
       |...........|         
       /...........|         
      |............|         
      |............|         
  -\--/.............\        
 /..................|        
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/===================|=====   
                     \       
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|         |         |        
0        10        20sec     
                             
 
 Numerical values of source time function
 Sampling dt:  1.0sec
 X10**17 Nm/sec
  0.00  2.14  2.90  2.94  2.33  2.51  2.78  5.18  7.28  8.59
 10.08 12.35 15.62 17.54 17.01 15.24 14.29 13.70 11.71  7.41
  2.60 -1.14 -2.38 -3.43 -2.69 -2.16
(STF Catalog Listing, go to: "http://www.geo.lsa.umich.edu/SeismoObs/STF.html")