The successful funding programme Eurostars supports international innovative projects led by research and development- performing small- and medium-sized enterprises (R&D-performing SMEs). With its bottom-up approach, Eurostars supports the development of rapidly marketable innovative products, processes and services that help improve the daily lives of people around the world. The Eurostars project QMag will develop a new airborne geophysical instrument which comprises a vector magnetometer having three orthogonal superconducting quantum interference device (SQUID) sensors. The system will have high sensitivity with noise < 10 fT/sqrt(Hz), and will have a wide dynamic range. This innovation will allow for the simultaneous measurement of the earth’s field and the audio frequency magnetotelluric (AFMAG) signals. This technology will be used for mapping geologic formations to great depth.