Scaling laws for planetary dynamos relate the characteristic magnetic field strength,
characteristic flow velocity and other properties to primary quantities such as core size …

Measurements of the Earth's magnetic field collected by low-Earth-orbit satellites such as
Swarm and CHAMP, as well as at ground observatories, are dominated by sources in the …

Polarization electric fields created by the E‐and F‐region dynamos cause the uplift of F‐
region plasma. The subsequent redistribution of that plasma along the magnetic field lines …

For many published dynamo models an Earth-like magnetic field has been claimed.
However, it has also been noted that as the Ekman number (viscosity) is lowered to less …

Achieving worldwide dependable alternatives to the Global Positioning System is a
challenging engineering problem. Current Global Positioning System alternatives often …

While high‐degree models of the Earth's gravity potential have been inferred from
measurements for more than a decade, corresponding geomagnetic models are difficult to …

The magnetic field of the Earth is by far the best documented magnetic field of all known
planets. Considerable progress has been made in our understanding of its characteristics …

The geomagnetic secular acceleration (SA), defined as the second‐order time derivative of
the Earth's core magnetic field, is investigated using data from the CHAMP satellite. We …

In this paper the new GFZ Reference Internal Magnetic Model (GRIMM) is presented. The
model has been derived from nearly 6 yr of CHAMP satellite data and 5 yr of observatory …

We present core flows constructed from high resolution secular variation (SV) models for the
epochs 2001, 2002.5 and 2004, assuming that these flows are quasi-geostrophic in the core …