100 



-7 300 



200 



100 



30 



% 



(Nuisberi Indlcac* amplitude rank for constltucnta) 



.060 0.080 



0.100 " 0.120 0.140 



FREQUENCY (HZ) 



Figure D-10. South Pass, 1520 to 1530 c.d.t., 600-second 

 record analyzed. 



200 



100 



" 300 



200 



100 



(Nunbera Indicate amplitude rank for coiutltuenca) 



J L 



J I L 



0.060 0.080 0.100 0.120 0.140 



FREQUENCY (HZ) 



Figure EHll. South Pass, 1530 to 1540 c.d.t., 600-second 

 re cord anal yzed . 



103 



