Digital one-minute values of the Geomagnetic field elements from Lerwick, Eskdalemuir and Hartland Observatories. Data are available from 1979 up to the present day. Most data are definitive, but recent data (within the last 2-3 years) and data between 1979 and 1982 are provisional and may be corrected in the future. The data from these observatories will not only aid scientific research into rates of change of the magnetic field and increase the accuracy of the BGS Global Geomagnetic Model, but will also provide data to exploration geophysicists engaged in current and future oil exploration.

Analogue aeromagnetic surveys of Great Britain for the Geological Survey (GSGB), consisting of flight line plans, magnetometer flight records, aerial photographs, contour maps.

High Resolution, Airborne Magnetic, Radiometric, VLF Survey over north Midlands of GB. Survey flying for the collaborative BGS and World Geoscience Corporation Ltd (WGC) high resolution geophysical and environmental survey was completed in early September 1998. The data comprise multi-channel gamma ray spectrometer, magnetometer and dual frequency VLF-EM. Flight line spacing was 400 m with tie lines at 1200 m and the total area surveyed is some 14 000 km2. Flight-line orientations are W–E over the western survey area, SW–NE over the eastern area. Ground clearance was maintained at 90 m in rural areas, increasing to about 240 m in built-up zones.

High Resolution / Local Aeomagnetic (+/- other Geophysical methods) Survey data consisting of flight line plans, magnetometer flight records, aerial photographs, contour maps, magnetic tapes. Many Surveys flown for BGS projects (eg DTI funded Mineral Reconnaissance Programme). Other surveys flown by commercial companies and subsequently deposited with BGS. Many of the surveys were flown by helicopter.

Airborne geophysical data acquired as part of the BGS-NERC TellusSW project (http://www.tellusgb.ac.uk/) during the second half of 2013. The survey comprised a high resolution magnetic/magnetic gradient survey combined with a multichannel (256 channel) radiometric survey. The survey was carried out using 200m (N-S) line separations at a mean elevation of 91m. Encompassing the counties of Cornwall and parts of Devon and Somerset, the survey provided 60,323 line-km of data. Digital data and derived (e.g. spatial derivatives) maps of the geophysical information are provided to facilitate spatial modelling of the soil, geological and environmental aspects of the data.

A significant part of this data collection is geophysical survey data in digital form, being mainly instrumental recordings made during fieldwork. Derived data created during the subsequent processing and interpretation of the field data is described in 'Nirex Magnetic Tape Archives - Processed Data'. These data were originally stored on a variety of media. With the overall aim of delivering an efficient and effective archive service, the data have been consolidated onto DLT cartridges. Some related data, which were either analogue, on obscure media or in unknown formats have been retained in their original form. British Geological Survey maintains a full catalogue of the data, as an Access database.The data sets that comprise the magnetic archive are the following: Seismic surveys: marine, land and transition zone; field, navigation, statiatcs; Geophysical wireline logging of boreholes: routine wireline logging of investigation boreholes (gamma-ray, sonic, porosity, etc.); velocity surveys; dipmeter surveys;vertical seismic profiling; borehole televiewer (BHTV) surveys; formation microscanner (FMS) surveys; Ground surveys: magnetic; gravity; radiometric; thermal imaging; photographic imaging; in-flight videos. The ownership of NIREX (Nuclear Industry Radioactive Waste Executive) was transferred from the nuclear industry to the UK Government departments DEFRA and DTI in April 2005, and then to the UK's Nuclear Decommissioning Authority (NDA) in November 2006.

Analogue and digital aeromagnetic surveys of (Offshore) UK Continental Shelf and other parts, comprising flight line plans,magnetometer flight records, aerial photos, contour maps, digital data.

Digitised version of aeromagnetic survey records of Great Britain comprising a record for each digitised point, supported by survey and 'ends and bends' based line indexes. Original records include flight line records, worksheets, contour sheets and air photos provided by contractors at completion of each survey. Worksheets digitised by BGS during 1980's Smith and Royles 1989.

This layer of the map based index (GeoIndex) shows unadjusted ship gravity, magnetic and bathymetry data acquired by BGS as part of its Offshore Reconnaisance Mapping Programme. This programme commenced in 1967, and was funded mainly by the Department of Energy. Unadjusted ship gravity and bathymetry data from various commercial and academic surveys between 1965 and 1994. Confidential M.O.D Hydrographic Office integrated ship gravity and magnetics surveys of NW Europe marine areas for which BGS acts as agent. Network adjusted gravity and magnetic compilations of data from BGS and non-BGS sources.

Corrected and smoothed ship gravity, magnetics and bathymetry data acquired by MOD Hydrographic Office for which BGS acts as agent. May be available for distribution subject to Hydrographic Office approval.