Bouman, J. et al.: Swarm magnetic gradients for lithospheric modelling (SLIM). EGU General Assembly, Vienna, April 2016

Bouman, J., J. Ebbing, S. Kotsiaros, M. Brönner, R. Haagmans, M. Fuchs, N. Holzrichter, N. Olsen and E. Baykiev:

Swarm magnetic gradients for lithospheric modelling (SLIM). EGU General Assembly, Vienna, April 2016. View presentation

We present first results of a feasibility study to use magnetic gradient information derived from Swarm data for
crustal field modelling. The study is part of ESA’s Support To Science Element (STSE) Swarm+ Innovations.
In a first step, magnetic gradients have been derived from the observations taken by the three Swarm satellites,
with emphasis on the two side-by-side flying spacecraft. Next, these gradients are used to compute magnetic gradient
grids at 450 km altitude (the present mean altitude of the lower Swarm satellites) for one example region,
North-West Europe. The suggested area comprise both exposed basement geology in southern Sweden and Norway
with crustal scale magnetic anomalies and the Sorgenfrei-Tornquist Zone, a well-studied large scale tectonic
fault system. With sensitivity analysis we studied the added benefit of the information from the gradient grids for
lithospheric magnetic field modelling. A wealth of aeromagnetic data and additional constraining information for
the example area allows us to validate our modelling results in great detail.