Contributed talk: Rapid geomagnetic variations: a new core message to decipher

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• Julien Aubert (Institut de Physique du Globe de Paris)
• Tuesday 29 November 2022, 14:30-15:00
• Seminar Room 1, Newton Institute.

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DY2W03 - Modeling, observing and understanding flows and magnetic fields in the Earth's core and in the Sun

The 20 yr-long global and continuous monitoring of geomagnetic variations by satellites has given access to a wealth of intriguing rapid signals in the interannual time scale range. In this presentation I will summarise recent numerical modelling advances that have enabled the simulation of such variations within a self-sustained convective dynamo of typically significantly longer (secular) time scales. I will present recent work that links these geomagnetic variations (and the associated geomagnetic jerks) to the propagation of rapid hydromagnetic waves in Earth’s core.

This talk is part of the Isaac Newton Institute Seminar Series series.

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