50 



CENTIGRADE 



11 



11 



h 



0600 1200 1800 0000 

 9/17/63 



Local time 



0600 1200 

 9/18/63 



FIGURE 5 VARIATION IN DEPTH OF SELECTED ISOTHERMS, 

 SEPTEMBER 17-18, 1963, BASED ON 6-MINUTE 

 THERMISTOR CHAIN SERIES 



412 



