Earth's magnetic field is generated by fluid motions in the outer core. This geodynamo has
operated for over 3.4 billion years. However, the mechanism that has sustained the …

Turbulent motions of liquid metal in Earth's outer core generate the geomagnetic field.
Magnetic field observations from low-Earth-orbit satellites, together with advanced numerical …

These lecture notes are based on a tutorial given in 2017 at a plasma physics winter school
in Les Houches. Their aim is to provide a self-contained graduate-student level introduction …

Precession of planets or moons affects internal liquid layers by driving flows, instabilities and
possibly dynamos. The energy dissipated by these phenomena can influence orbital …

The generation of a magnetic field in an electrically conducting fluid generally involves the
complicated nonlinear interaction of flow turbulence, rotation and field. This dynamo process …

It has been recently suggested that white dwarfs generate magnetic fields in a process
analogous to the Earth. The crystallization of the core creates a compositional inversion that …

Thermal interactions between Earth's core and mantle provide the power that maintains the
geomagnetic field. However, the effect of these interactions and, in particular, the …

We investigate heat transport associated with compositionally driven convection driven by
crystallization at the ocean–crust interface in accreting neutron stars, or growth of the solid …

The Earth's magnetic field displays variations on a broad range of time scales, from years to
hundreds of millions of years. The last two decades of global and continuous satellite …

Geomagnetic jerks are abrupt changes in the second time derivative—the secular
acceleration—of Earth's magnetic field that punctuate ground observatory records. As their …