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GIC services

World Magnetic Model

Sign-up for alerts

New GIC service

We monitor the geomagnetic field to provide near-real-time information about geomagnetically induced currents (GIC) and the risk to ground based technology. We have developed a new service to give a measure of GIC risk in the UK.

World Magnetic Model

The World Magnetic Model was recently revised out of cycle due to the Earth's erratic core field. Be sure to get the latest World Magnetic Model (WMM) values!

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.