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

Geomagnetic disturbance alert - 19th-21st December 2014

There is an increased chance of a geomagnetic disturbance throughout the weekend due to the arrival at Earth of two coronal mass ejections (CMEs) seen leaving the Sun on the 17th and 19th December.

More information on the alert.

World Magnetic Model 2015 released!

The latest revision of the World Magnetic Model has been released. This five-year model valid until 2020. This was created jointly by BGS and NOAA.

Read more about the World Magnetic Model here.

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.

Geomagnetism Review 2013

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

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.