Take the 2-minute tour ×  I am trying to find out what formula
to use for the above issue. If I do a gravity measurement above
a volcanic chamber, what do I have to do? I thought about adding
the Bouger corrections, as it is a mountain I am measuring on,
but I do not know the density of the mountain, only for the
bedrock around the crater. How do I do this, then? I found
something about "buried bodies", but I do not know if you can
name a chamber (="hole") a buried body. Can someone help out?
share|improve this question  1 Answer 1  As I recall you
calculate the (repulsive) force from a body of negative matter
the same size as the hole, then you add that to the Earth's
gravity with no hole. The result is to reduce the Earth's
gravity slightly.  share|improve this answer  Your Answer