AUTHOR     = A.S. Laughton andC. Tramontini
YEAR       = 69
FIGNUMBER  = Generated from table I
SOURCE     = Tectonophysics, Vol 8 (1969), 359-375
TITLE      = Recent Studies of the Crustal Structure in the 
             Gulf of Aden

About the experiment in general ...
The data for this profile was obtained during an expedition in 
R.R.S. "Discovery", Spring of 1967.  One of the objectives of 
this experiment was to determine the crustal structure by the 
seismic refraction method in areas critical to the theory of 
continental separation.
Two reversed and four unreversed seismic refraction stations 
were shot using the Hill technique of sono-radio buoys and 
single ship shooting.  Shots were fired during the night 
between 23.00 and 4.00 because experience showd that this time 
was most free from radio interference.  Arrivals were obtained 
out to a maximum range of 52 sec (80 km).  Four buoys were 
usually laid covering a range of 1.5-3 miles (2.8-5.5 km).  At 
each station a profile of sound velocity in the sea to 820 
fathoms (1,500 m) was obtained using a velocimeter.  The surface 
horizontal velocity could therefore be calculated for use in the 
reduction of the seismic data.

About this profile ...
This profile was one of the reversed ones.  

This figure is available in gif or postscript format.

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