319 citations · 456 across the 5 of their papers we have counts for
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physics.geo-ph2022★ 6 cited
Secular variation signals in magnetic field gradient tensor elements derived from satellite-based geomagnetic virtual observatories
Magnus Danel Hammer, Christopher C. Finlay, Nils Olsen
We present local time-series of the magnetic field gradient tensor elements at satellite altitude derived using a Geomagnetic Virtual Observatory (GVO) approach. Gradient element t…
physics.geo-ph2022★ 58 cited
Rapid Variations of Earth's Core Magnetic Field
V. Lesur, N. Gillet, M. D. Hammer +1
Evidence of fast variations in the Earth's core field are seen both in magnetic observatory and satellite records. We present here how they have been identified at the Earth's surf…