When you stand relatively close to a seismic vibrator you can literally feel the earth shaking. I don't know if you could feel this jebel shaking or not but certainly had we set geophones on it we'd have detected it shaking.
The vibs are traversing a path cut by our bulldozer – you can see the line of the cut traversing the image. Had the survey line been out where I'm standing to take this photo the four vibs would have been in a line abreast of each other rather then in-line as they are here.
A small dust cloud has been kicked up by the vibration action as the vibs shake the ground.
What I find most interesting here is the size of the boulders that have fallen off the jebel. Given that the tyres on the vibs are 5 ft in diameter, that makes the boulder on the left over 15 ft (5m) high and 33 ft (11m) long! I can only imagine the sound that must have made. It must have fallen from the very top to have had the momentum to land where it did.
A jebel, by the way, is the English pronunciation of the Arabic word for hill or mountain.
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