​​​​​The Tellus survey is a national programme to gather geochemical and geophysical data across Ireland – in other words, to examine the chemical and physical properties of our soil, rocks and water.

Tellus is undertaken by the Geological Survey Ireland and is funded by the Department of Communications, Climate Action and Environment. All data from Tellus is made available free of charge online.

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.

To date, Tellus surveying has been completed in Northern Ireland (2004–2008) and the border region of Ireland (2011–2013). Tellus airborne surveying has been completed in the north midlands region of Ireland (2014–2015), the eastern midlands region (2015), and most recently the west of Ireland (2016 -2017). The Tellus airborne geophysical survey has now mapped 50% of the country.

For 2018, plans are underway which will see the Tellus aircraft extend its surveying activities into counties Limerick and north Tipperary as well as west Cork, due to commence in May 2018.

Details of the geochemistry survey for 2018 will follow soon.​

Find out more about our ground and airborne field operations and view our data products.

The airborne and ground survey will be commencing in late spring/early summer 2018. More details to follow soon. ​

Tellus collects geochemical and geophysical data that will inform the management of Ireland’s environment and natural resources.

Tellus undertakes research with a range of collaborators in order to maximise the societal and economic benefits of the geochemical and geophysical data. Explore the themes to see how Tellus​ data is being used to benefit society.’s-northwest-revealed-in-latest-phase-of-Tellus-survey-by-Geological-Survey-Irel0309-3196.aspxMore geological secrets of Ireland’s west and northwest revealed in latest phase of Tellus surveyAirborne geophysical surveys show the ancient building blocks that formed Ireland. New data will be used to help redraw geological maps for the region. Survey results will be useful for natural resource management. Geological heritage audit for County Galway outlined.12/03/2018 00:00:00 to 8 new PhD projects for iCRAGThe Irish Centre for Research in Applied Geosciences (iCRAG) and Geological Survey Ireland (GSI) are inviting potential postgraduate student supervisors to submit proposals to its new Environmental Geosciences Postgraduate Programme.06/03/2018 00:00:00 regression model for detecting radon prone areas in Ireland. 01/12/2017 00:00:00 Economic Review of the Irish Geoscience Sector07/11/2017 00:00:00