Geomagnetic Storm Warning - 20th January 2012

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BRITISH GEOLOGICAL SURVEY: NATIONAL GEOMAGNETIC SERVICE
GEOMAGNETIC STORM WARNING
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On 19 January there was an M3.2 X-ray solar flare and
an associated full-halo Coronal Mass Ejection (CME). We expect
this CME to strike Earth's magnetosphere in the next 24 to 36 hours.

Following this event there is an increased risk of a geomagnetic
STORM from late on 21-JAN to 22-JAN (UK time). There is also an
increased chance of viewing the aurora borealis (or australis)
during local night-time hours, assuming dark and clear skies,
though this is dependent on the configuration of the interplanetary
magnetic field (IMF) embedded in the solar wind.

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