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GeoSocial Aurora

Automatic detection of ionospheric Alfvén resonances

Geomagnetism Review 2013

Grid Magnetic Angle calculator

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GeoSocial Aurora - share your aurora sightings!

Share your aurora sightings with us through a new mapping tool GeoSocial - Aurora!

Tweet your geo-located sightings and see them displayed on the map for others to see!

Read more about how GeoSocial may help aurora prediction.

Automatic detection of ionospheric Alfvén resonances

A new paper published on automatic detection of ionospheric Alfvén resonances.

Read more about BGS's work with high-frequency magnetomers.

Geomagnetism Review 2013

Read our review of the Geomagnetism Team's activities in 2013.

Grid Magnetic Angle calculator

Something interesting is happening to the magnetic field in Great Britain this year. Find out what!

Try out our grid magnetic angle calculator to correct between magnetic bearings and map bearings.

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.

Latest News

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.


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.