UK’s geomagnetic blind spots tackled with new observatories
Three new geomagnetic observatories have been installed across the UK to fill in the country’s 'blind spots' and tackle the risk posed by space weather.
28/07/2022 By BGS Press
Three new underground geomagnetic observatories in County Fermanagh, Leicestershire and Sussex will detect and eventually help predict space weather, which can potentially disrupt power grids, satellite communications and the GPS on smartphones.
They were installed underground in quiet, rural locations by the BGS Geomagnetism team. The solar-powered observatories will collect data about Earth’s natural magnetic field and send it back to BGS in real-time, using the mobile phone network.
Why do we need new geomagnetic observatories?
Intense geomagnetic storms can have an adverse impact on technology like
power systems, satellite operations and smartphones.
The new magnetometers mean we now have full coverage of magnetic field change across the UK.
Very large geomagnetic storms produce widespread aurora. While beautiful, they have the potential to be incredibly disruptive.
They could cause power disruption and affect essential services like satellite communications and transport.
Now that we have monitors in our blind spots, we will better understand in detail where and what ground effects can occur and understand why they happened.
Dr Ciarán Beggan, BGS Geophysicist.
Britain has had geomagnetic observatories in Shetland, Eskdalemuir and
Devon since 1908, covering the country from north to south; the three new observatories will improve the breadth of measurements from west to east.

Zones of influence for the geomagnetic observatories.
The blue dots are existing observatories in the UK, Ireland and in northern Europe. The green dots are new UK observatories, three of which BGS installed in the past six months. The graded colouring from red to yellow shows the distance away from each location (up to 300 km away). No UK observatory is more than about 350 km (yellow colour) from its nearest neighbour and every part of the UK is within 200 km of an observatory.
The Aberdeen observatory is operated by Lancaster AuroraWatch, not BGS.
BGS © UKRI.
Mitigating a national risk
Severe space weather was included in the UK Government’s National Risk Register 2020.
Geomagnetic storms are one form of space weather. They interrupt essential
services by creating geoelectric fields in the subsurface, which then flow
into transformers, pipelines and railways, causing malfunctions.
Other effects include an increase in the density of the upper atmosphere (ionosphere), which disrupts radio waves passing through it. This leads to a loss of signal between the ground and satellites, affecting communications and the accuracy of global navigation satellite systems (GNSS). A huge number of technology systems rely on GNSS, including:
- phones
- trains
- self-driving vehicles
- timing for internet transactions
Major geomagnetic storms are relatively rare but, as Dr Beggan points out, they
have a pattern.
Major geomagnetic storms happen every 30 or 40 years in the UK, but we haven’t had a big one since 1989.
We live in a completely different society now, where we are all reliant on
continuous electricity supplies, smartphones and satellite communications — a major geomagnetic storm could significantly reduce those services.We’re currently moving into a stronger part of the solar cycle, which means the chance of large geomagnetic storms is greater.
Geomagnetic storms are currently hard to predict in terms of size or even arrival time from the Sun. Adding the new sensors means we are able to measure their effects on the ground in real-time and advise on the impact on technology.
Dr Ciarán Beggan, BGS Geophysicist.
Further reading
- Find out more about geomagnetism from BGS
Funding
The geomagnetic observatories were funded by UK Research and Innovation’s £20 million Space weather innovation, measurement, modelling and risk (SWIMMR) programme.
Relative topics
Media contact: Sarah McDaid (sarah@mcdaidpr.co.uk 07866789688)
How were the new sites selected?
Ciarán Beggan said: ‘We need a magnetically quiet, secure site. A magnetically quiet site must be at least 250 m from buildings, power lines and electric fences and 5 km from an electrified train line.
‘Ideally, it will have a south-facing aspect for the solar panel and 1 m of soil to allow the sensor to be buried. We ask permission from the landowner prior to installation. We want locations that are around 200–250 km from the existing observatories as this is the general “scale” of magnetic field changes during geomagnetic storms.
‘Fermanagh is the most westerly part of Northern Ireland. The Sussex site is relatively easterly and is part of an existing BGS facility at Herstmonceux. The Leicestershire site is approximately in the middle of England, equidistant between the observatories in Devon and Eskdalemuir.’
Examples of geomagnetic storms having adverse impact:
- 2022: Elon Musk’s SpaceX lost 40 satellites in one day as the result of a geomagnetic storm
- 2003: power outage in Sweden caused by geomagnetic storm
- 1989: Quebec 12-hour blackout caused by geomagnetic storm
- 1859: the ‘Carrington storm’, the biggest ever geomagnetic storm recorded, when people could see the northern lights in the tropics
- What if the Carrington storm happened today, in the satellite comms and smartphone era?
Related news

World Water Day 2023: groundwater photo stories
22/03/2023
A showcase of groundwater use from around the world highlighting how developing groundwater has benefited the lives of many people.

New seabed geology maps for offshore Yorkshire
14/03/2023
Offshore Yorkshire is the latest map to be released in BGS’s series of fine-scale digital seabed maps.

New BGS karst report released for Hampshire and Wiltshire
10/03/2023
The report details the evidence for karst processes in areas of soluble rocks that have not previously been considered karstic.

Dr Corinna Abesser appointed BGS Policy Director
08/03/2023
Dr Abesser will be supporting BGS staff in the translation of their science outputs to inform policy and regulation as well as advising senior management on policy-related issues.

Melinda Lewis awarded prestigious Whitaker Medal for outstanding contribution to hydrogeology
01/03/2023
Melinda Lewis, BGS Honorary Research Associate, has been awarded the Geological Society Whitaker Medal, recognising outstanding long-term contributions to hydrogeology.

BGS welcomes two new board appointments for 2023
22/02/2023
Prof Carol Frost, professor emerita of the faculty of geology and geophysics at the University of Wyoming, and Dr Jenny Pyper, former CEO of the Utility Regulator for Northern Ireland and interim head of the Northern Ireland Civil Service, will take up their positions on the BGS Board from 1 March 2023.

Six BGS datasets for assessing shrink–swell subsidence hazards
17/02/2023
Shrink–swell subsidence is one of the most significant geological hazards affecting the UK. BGS has six datasets to help assess the problem.

The Kahraman Maraş earthquake sequence, Turkey/Syria
14/02/2023
Two large earthquakes occurred within hours of each other on 6 February 2023.

One year on: reflections on the Hunga Tonga-Hunga Ha’apai volcanic eruption
18/01/2023
The eruption of the Hunga Tonga-Hunga Ha’apai Volcano in January 2022 has highlighted a global unpreparedness for the impacts from large-scale global events.

New geological map of the Maltese Islands published
19/12/2022
The new map, commissioned by Malta’s Continental Shelf Department, is the first update for almost 30 years.

Work complete on 1000 solar panels at BGS
07/12/2022
More than 1000 energy-saving solar panels have been installed at BGS’s headquarters in Keyworth, Nottinghamshire.

Updated radon map for Great Britain published
02/12/2022
The UK Health Security Agency and BGS have published an updated radon potential map for Great Britain.