Magnetotelluric works by measuring natural electromagnetic fields, which are created by lightning storms happening around the world and solar winds interacting with the Earth’s magnetic field.
MT methods detect how these electromagnetic fields pass through the Earth. By studying this, we can map out the differences in electrical conductivity of underground materials, even hundreds of kilometres deep.
There are different types of MT surveys used to study underground conductivity at different depths. These include:
- Audio Magnetotellurics (AMT): Used to study shallow areas, from the surface down to a few kilometres deep.
- Broadband Magnetotellurics (BBMT): Can study both shallow areas and deeper ones, reaching depths of tens of kilometres.
- Long-Period Magnetotellurics (LPMT): Focuses on very deep areas, hundreds of kilometres below the surface, like the lower crust and upper mantle.
Each method is designed to explore specific layers of the Earth, helping us to understand the structures and materials at those depths.
Our current MT survey is WA-MT, which is part of WA Array.
MT data can also be downloaded from the National Computational Infrastructure (NCI) Data Catalogue.
| Year | Survey and related publication | MAGIX R# |
| 2023-24 | AusLAMP Eucla Long–period MT Survey | Planned Geoscience Australia MT collection for 2020-2024 |
| 2023-24 | AusLAMP South–west Long–period MT Survey (note: download also includes 1 site from the Eucla, WA) | 72789 |
| 2020 | Kalgoorlie EIS Funded Broadband MT Survey | 72154 |
| 2019 | Eastern Goldfields Long–period MT Survey | 72164 |
| 2019 | AusLAMP Northern Australia Long-period MT bordering WA | Download from Geoscience Australia |
| 2017 | Coompana Pre-drill Boradband Magnetotelluric Data bordering WA | Download from Geoscience Australia |
| 2017 | Rhea Broadband MT Survey | 72579 |
| 2016-18 | AusLAMP Musgraves Long–period MT Survey | 72444 |
| 2016 | AusLAMP Capricorn Long–period MT | Data being processed by Geoscience Australia |
| 2016 | Yamarna Broadband MT Survey | 71590 |
| 2016 | Plumridge Lakes Broadband MT Survey | 72583 |
| 2015-16 | AusLAMP South Australia Long–period MT bordering WA | Download from SARIG |
| 2014 | Eucla–Gawler Deep Seismic Reflection and Broadband MT Surveys | 71124 |
| 2014 | Abra Broadband MT Survey | 72580 |
| 2013-15 | Central and East Capricorn Orogen Broadband MT Surveys | 71507 |
| 2013 | Thaduna Audio-MT Survey | 72788 |
| 2012-13 | Albany-Fraser Orogen Broadband MT Survey | 70989 |
| 2012 | Kimberley Craton Broadband MT Survey | 71007 |
| 2012 | Tropicana Broadband MT Survey | 71292 |
| 2011 | Mt Monger Broadband MT Survey | 72575 |
| 2011 | Yilgarn Craton–Officer Basin–Musgrave Province Deep Seismic Reflection and MT Surveys (Long–period and Broadband) | 71009 |
| 2011 | East Capricorn Orogen (Marymia) Broadband MT Survey | 71022 |
| 2011 | West Musgrave Province Broadband MT survey | 71024 |
| 2011 | DeGrussa Broadband MT Survey | 72582 |
| 2011 | Magnus Broadband MT Survey | 72581 |
| 2010 | West Capricorn Orogen Deep Seismic Reflection and Broadband MT Surveys | 70968 |
| 2010 | Youanmi Deep Seismic Reflection and MT Surveys (Long–period and broadband) | 70992 |
| 2009 | Southern Cross Broadband MT survey | 71023 |
| 2009 | Byro Broadband MT Survey | 71181 |
| 2006 | Kalgoorlie Deep Crustal Reflection Seismic Survey and Long–Period MT Survey | 72001 |
| 2003 | Gascoyne Long–period MT survey | 72006 |
| 2000 | Kimberley–Halls Creek Long–period MT Survey | 72000 |
