Javascript is disabled on this browser.
Javascript must be enabled for this website to display and function correctly.

New Paper

New models: WMM and IGRF

Sign-up for alerts

Differential Magnetometer Measurements of GICs

Dr Juliane Huebert has published a paper about differential magnetometer measurements of geomagnetically induced currents (GIC) in a complex High Voltage network. This work was developed through the SWIGS (Space Weather Impact on Ground-based Systems) project.

New models: WMM2020 and IGRF 13th Generation

New models are now available! World Magnetic Model 2020 has just been released, and IGRF 13th Generation model is also now available.

Sign-up for geomagnetic disturbance alerts

When we predict an increase in magnetic activity we send out a geomagnetic disturbance alert.
Notice of a potential magnetic storm increases your chance of seeing the Northern Lights!
Sign up for alerts by email or Twitter.

About BGS Geomagnetism

The Geomagnetism team measures, records, models and interprets variations in the Earth’s natural magnetic fields.

Our data and expertise help to develop scientific understanding of change in the Earth and the environment, from deep within the core out into space.

We also provide geomagnetic products and services to industry and to academic colleagues and we use our knowledge for information and education.

Video introduction


Modelling the Earth's magnetic field, space weather hazards.


About our magnetic observatory operations, UK surveying, equipment.

Data and Services

Observatory data, indices, models, charts, applications.


Overviews of the Earth's magnetic field, reversals, magnetic poles.

Global activity now!

Find out what the current global geomagnetic activity level is.