A series of coronal mass ejections (CMEs) left the Sun on 15-April, all associated with filament eruptions. One of these eruptions produced a partial-halo CME at around 23:00 hours UT on 15-April, which is expected to arrive on 20-April or possibly late on 19-April.
The geomagnetic field has been disturbed by an earlier CME yesterday (18th), and there is a slight chance for a glancing blow from another during the day today (19th). Following the arrival of the partial-halo CME, the geomagnetic field is likely to become enhanced with a chance for some more significant activity, especially when combined with earlier CMEs.
Assuming clear, dark skies, there is a greater chance of seeing the aurora on the 19-April through to the 21-April. Those in Scotland, northern England and Northern Ireland have a better chance if the weather is favourable on those nights.
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