Tellus involves two types of surveying – airborne geophysical surveying using a low-flying aircraft and ground-based geochemical surveying of soil, stream water and stream sediment.
During 2021 the Tellus Survey aircraft flew in County Cork and neighbouring parts of Limerick, Waterford and Tipperary. In 2024 the plane is due to fly again. The Tellus soil sampling teams are currently in South East Ireland (the G10 Block),