May 122015

(This site is temporarily hosted on a private website – it will be moved shortly.)

The Bullard Archive was started in 2002 to preserve what remained of the geophysical and associated equipment and documents that had been used by the University of Cambridge Department of Geodesy and Geophysics and the Earth Sciences Department since the start of geophysical work in Cambridge as long ago as 1937.  This website will host articles describing the equipment and experiments as well as recent and original photographs and  documents. change

Jul 042016

Early Marine Seismics in Cambridge – Review

Tim Owen

Bullard |Archive copyright 2015

May 2015

The use of seismic techniques to investigate subsurface geology on land goes back to the 1920s in America where it was used for oil exploration, but it was not until 1936 that the attempts were made to use seismic investigations at sea. In Cambridge the first land seismics was done by Mr Edward Bullard and Tom Gaskell, Kier Grant and W.B.Harland in East Anglia from 1936 to 1938. The first marine seismics was undertaken by Professor Maurice Ewing of Princeton University (or was it before he went to Princeton ?) in about 1935, to whom credit is due for the taking the first steps into the unknown – at this time the no-one knew if hydrophones in the water would pick up seismic waves, or whether explosions near the surface could be substituted for charges placed on or in the seabed, so the initial course of action had to be to mimic land experiments as closely as possible by putting geophones and explosions directly on the seabed. Cambridge got in on the act pretty quickly! In 1937 Dr E.C.Bullard (Teddy, later Sir Edward Bullard) was invited to America by Professor R.M. Field, chairman of the American Geophysical Union for the Geophysical Study of Ocean Basins and went to sea with Ewing to witness the preliminary tests of the technique.

Teddy Bullard in 1939 on the Renown

 Teddy Bullard in 1939 on the Renown

Continue reading »

Jan 142016




Early Marine Refraction Seismology and Development of the Cambridge Radio Sonobuoy System

An account of the technology, instrument development and equipment deployments 1937 – 1980.

M Mason  Nov 2016

BAGS Ref. 0465 Copyright 2016

Continue reading »