TABLE 1. Seismic data taken in 1954. 



Range 

 (meters) 



Longitudinal 

 Plate-Wave 



Velocity 

 (meters/sec) 



Air-Coupled 



Flexural Wave 



Frequency 



(cps) 



Calculated Ice 

 Thickness 



(cm) 



Mean Measured 



Ice Thickness 



with Probable 



Error 



(cm) 



Size of 



TNT Charge 



(lbs) 



457 



2629 ± 60 



46.0 



69.3 



78.7 ± 2.5 



10 



548 



2740 ± 60 



— 



— 



- 



10 



912 



2553 ±60 



39.4 



78.4 



86.9 ± 4.8 



15 



912 



2553 ± 60 



43.5 



76.8 



86.9 ± 4.8 



15 



1003 



2495 ± 60 



41.7 



79.9 



86.9 ± 4.8 



15 



910 



2603 ± 60 



— 



- 



- 



40 



1002 



2615 ±60 



43.7 



65.2 



86.9 ± 4.8 



40 



HORIZONTAL-LONGITUDINAL 

 TO WAVE FRONT 

 VERTICAL-TRANSVERSE 

 TO WAVE FRONT 



SHOT BLAST STATION* 



457.2 METERS 













HUAAMOCKED ICE 

 AREA (LESS THAN 1%) 



' 





SHOT BLAST STATION'" 





457-2 METERS 



▲ -4 



I 



Figure 2. Equipment layout on ice sheet (1954). 



