* Astronomy

A small geomagnetic storm recorded.

Proba-2 shows solar eruption that touched Earth

Polar skies glowed with ghostly auroras last week during the biggest geomagnetic storm of 2010. The event owed its origin to a solar eruption a few days earlier - revealed here in high-speed detail by ESA's small Sun-watcher Proba-2.
Eruptions like this one have several components, most notably solar flares and Coronal Mass Ejections (CMEs). Solar flares are caused by sudden impulsive releases of magnetic energy from the surface of the Sun.
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