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World Magnetic Model update

MagQuest - An innovation challenge for magnetic field measurement

US National Geospatial-Intelligence Agency has launched MagQuest, an innovation challenge to advance how we measure Earth's magnetic field. The challenge is seeking solutions for geomagnetic data collection for the World Magnetic Model. Enter by 16th May.

Podcast - Where on earth is North?

Dr Ciaran Beggan is in conversation with Ian Sample for the Guardian's science weekly "Where on earth is North?" podcast.

Updating the World Magnetic Model: from the centre of the Earth, straight to your pocket

Read our latest blog post where Will Brown describes how the Earth's erratic core field has prompted a recent revision to the World Magnetic Model (WMM). Find out how that change will affect the phone in your pocket!

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.