This photograph of lightning sprites was taken from Czech Republic in August 2017 and it was the first time that an event of this type left its signature simultaneously in satellite data. Two of ESA’s Swarm satellites registered perturbations in their magnetic field data as they passed over Poland. The distance between the ground tracks of the satellites and the centre of the storm was about 500 km. The event caused fluctuations in the scalar magnetic field with amplitudes reaching 0.2 nT. Now a scientific paper has been published about using Swarm to help provide evidence of links between transient luminous events and magnetic-field fluctuations in the upper ionosphere.
Read full story: The curious incident of Swarm and sprites in the night-time