A collection of simulated geomagnetic jerk events has been built using a numerical model of the geodynamo that reaches closer to Earth’s core conditions than earlier models. This new paper presents a systematic analysis and categorisation of these events, according to the role played by rapid hydromagnetic waves in triggering these. We also characterise the (high) level of agreement between the signatures of these events in the magnetic field produced by the dynamo and their geomagnetic counterparts from historical and recent ground observatory and satellite records.

Aubert, J., Livermore, P., Finlay, C., Fournier, A. and Gillet, N.: A taxonomy of simulated geomagnetic jerks, Geophys. J. Int. 231, 650-672, 2022, doi:10.1093/gji/ggac212