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Data and Services

BGS provide a range of geomagnetic data and services. Magnetic observatory and survey results, local and global activity indices and forecasts are all available. You can calculate your own magnetic field values from a variety of global and local magnetic field models, view charts produced from these models and access other navigational information. We describe some of the applications the data and models help support. Expert services and impartial advice can be provided to clients in the UK and around the world.

BGS logo Data

BGS Observatory Data and Monthly Bulletins
Magnetic Indices (K, aa, Ap)
Global Annual Mean Observatory Data
Global Repeat Survey Data

BGS logo Models and Compass Variation

Grid Magnetic Angle calculator for Great Britain
World Magnetic Model (WMM) - Calculator and Charts
BGS Global Geomagnetic Model (BGGM) - Download
International Geomagnetic Reference Field (IGRF) - Calculator
Geomagnetic Coordinate Calculator

BGS logo Space Weather

Solar and Geomagnetic Data and Forecasts
Geomagnetic Pulsations
Geo-electric Field Measurements
Space Weather alerts

BGS logo Directional Drilling Applications & Services

BGS Global Geomagnetic Model (BGGM)
In-Field Referencing (IFR)
Interpolation In-Field Referencing (IIFR)

BGS logo World Data Centre for Geomagnetism, Edinburgh (External link)

Node of the World Data System

If the data supplied here are used in publications and presentations, the data suppliers should be acknowledged. For commercial applications of these data, please contact the relevant institute directly.