Unlocking the Heat Beneath Our Feet: Aberdeen's Bold Step Toward Geothermal Energy with City-Wide Seismic Sensors
By: Robert Buluma
Aberdeen, long known as Europe's oil and gas capital, is quietly pivoting toward a cleaner, more sustainable future. On February 13, 2026, researchers from the University of Aberdeen announced a groundbreaking milestone in the Aberdeen Geothermal Feasibility Pilot (AGFP): the deployment of a city-wide network of seismic sensors to map the subsurface and assess the potential for geothermal heating.
This initiative could transform how Aberdeen heats its homes, public buildings, and institutions, tapping into the natural heat stored in the ancient granite beneath the city.
What is Geothermal Energy and Why Aberdeen?
Geothermal energy harnesses the Earth's internal heat—generated from radioactive decay and residual heat from the planet's formation—for practical uses like district heating. Unlike solar or wind, it's available 24/7, providing stable, low-carbon baseload energy.
In Aberdeen, the geology is particularly promising. The city sits atop a massive granite pluton, part of the Caledonian igneous rocks formed hundreds of millions of years ago. Granite has a higher geothermal gradient (temperature increase with depth) than sedimentary rocks, meaning heat accumulates more effectively at accessible depths.
Traditional geothermal often relies on hot springs or volcanic areas, but modern approaches like Enhanced Geothermal Systems (EGS) work in "hot dry rock" environments. Cold water is injected deep underground, fractures the rock to create reservoirs, absorbs heat, and returns as hot water to drive heating systems. Aberdeen's granite, covered by sedimentary layers, offers ideal conditions for such systems, potentially supplying renewable heat to combat fuel poverty and cut emissions.
The Aberdeen Geothermal Feasibility Pilot (AGFP): A Collaborative Effort
Launched with a £1 million grant from UK Research and Innovation (UKRI) in late 2025, the AGFP is led by the University of Aberdeen. It brings together expertise from the university's Geosciences, Engineering, and Estates schools, plus the Centre for Energy Transition and Just Transition Lab.
Partners include NHS Grampian, Aberdeen City Council, Aberdeen Heat and Power, Robert Gordon University, the British Geological Survey, Geosolutions Leeds, TU Delft, the National Geothermal Centre, Net Zero Technology Centre, Aberdeen Renewable Energy Group, and industry experts.
The project aims to create open-access datasets on heat flow, hydrogeology, and subsurface structure—valuable nationally and internationally.
The Seismic Node Deployment: Listening to the Earth
The recent excitement centers on deploying around 100 seismic nodes—compact devices (about 10 cm x 10 cm x 30 cm)—buried in green spaces across the city. These include public parks, private gardens, commercial sites, and municipal areas, spanning from Bridge of Don to Nigg and inland to Hazlehead.
Installed over three days by volunteers, each node is covered by a thin soil layer and will passively record ambient seismic noise from natural sources (waves, wind) and human activity (traffic) for 1-2 months.
This "seismic noise" technique uses passive ambient vibrations to image subsurface structures without active sources like explosions. The data will generate a detailed 3D map of granite and other formations down to 5 km depth, identifying zones with optimal heat potential, fractures for fluid flow, and suitable locations for future wells.
Dr. Amy Gilligan, AGFP researcher, explained: “This marks the beginning of an exciting stage of the project. By placing these small sensors in the ground, we can safely and quietly listen to natural vibrations and build a picture of the rocks deep below Aberdeen.”
She added: “Most people won’t notice the sensors once they are in place but what we learn will help us understand whether geothermal heat could one day provide a clean, local source of heating for homes and public buildings, reducing carbon emissions and support a more sustainable energy future for Aberdeen.”
Earlier, in late 2025, the team tested the approach with 32 nodes on the university campus.
Next Steps: The Borehole and Beyond
Pending planning approval, the project includes drilling an instrumented borehole over 500 meters deep on King's College campus in Old Aberdeen. This will yield direct measurements of temperature, geology, and hydrology—ground-truthing seismic data and testing granite heat extraction feasibility.
Data from sensors and borehole will be openly shared, potentially accelerating geothermal projects city-wide and across the UK. It could inform heating for the University, NHS facilities, and homes via district networks.
This aligns with Scotland's net-zero goals and Aberdeen's energy transition from fossil fuels. As Professor Peter Edwards and others highlight (in project photos with team members like technician Iona Copley, researcher Tristan Roberts, and co-lead Dr. David Cornwell), collaboration is key.
Why This Matters for the Future
If successful, Aberdeen could pioneer deep geothermal in non-volcanic UK settings, reducing reliance on imported gas, lowering bills, and cutting emissions. Granite heat could provide reliable, local energy amid climate challenges.
The AGFP is more than a scientific exercise—it's a blueprint for sustainable urban heating. As Aberdeen listens to its subsurface, it may unlock a resource hidden for millennia, powering a greener tomorrow.
Source: University of Aberdeen
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