Oil & Gas Moray Firth seismic survey startsTGS, of Norway, has started a 1,650sq km high-density multi-client 3D seismic survey covering a portion of the outer part of Scotland's Moray Firth. July 5th 2010, 3:25 am 1 min read Facebook An icon of a facebook f logo. LinkedIn An icon of the LinkedIn logo. Twitter An icon of the Twitter logo. TGS, of Norway, has started a 1,650sq km high-density multi-client 3D seismic survey covering a portion of the outer part of Scotland's Moray Firth.