Our picture of the Earth magnetic field has changed considerably due to the availability of high-resolution observations from recent satellite missions, Ørsted, CHAMP and SAC-C. In particular, the continuous stream of vector magnetic field data from CHAMP over a full decade has revealed a number of unexpected results. Among them are effects caused by ionospheric phenomena. CHAMP recorded magnetic signatures associated with equatorial plasma bubbles, plasma blobs, and medium-scale TIDs. Even the tiny signals of ocean currents have been detected. The unique long and continuous dataset has allowed to detect from space abrupt changes of the core field and to better characterise geomagnetic jerks. Moreover, in recent years CHAMP altitude has gone down (~300km) and the measurements are taken during extremely low magnetic and solar activity. The latter data are very promising for high-degree lithospheric field modelling.

This session solicits all kinds of contributions that explore and interpret the geomagnetic field with an emphasis on data provided by recent magnetic field missions. Our aim is to bring together scientists investigating ionospheric and magnetospheric signatures with those working on internal magnetic fields.