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All the Norths

Magnetic Uncertainty

Geomagnetic disturbance alert - 14th January 2022

There is an increased chance of a geomagnetic disturbance due to the arrival at Earth of high-speed solar wind from a coronal hole. Chance of aurora on the 15-16th January.
More information on the alert.

The Great North Run

The directions of true, grid and magnetic north will, for the first time, coincide at various locations in Great Britain between 2022 and 2026.

Magnetic uncertainty

A new paper estimates how accurate magnetic values of the IGRF are on average across the globe.

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.