ARLA/CLUSTER: Auroras Boreais para o Dia das Bruxas (31 de Outubro).?

[João Costa > CT1FBF]

*Aurora for Halloween ?*

*Space Weather* reports that as October comes to an end, a series of
Coronal Mass Ejections (CMEs) are sweeping past Earth

The first three were expected to deliver glancing blows on October 28
through October 30, possibly having little effect. A more direct hit is
likely on October 31 when a CME from Earth-facing sunspot AR1882 arrives.

It was propelled in our direction by an M4-class flare on October 28.
High-latitude sky watchers should be alert for auroras on Halloween.

An aurora can produce DX propagation in the 50/70/144 MHz bands.

Space Weather
http://spaceweather.com/
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