Solar activity has been at low levels for the past 24 hours. There are currently three numbered sunspot regions on the disk – AR 1633 (Beta region), AR 1634 (Beta region) and AR 1635 (Beta-gamma region, Bright H-alpha). Sunspot 1635 could produce M-class solar flares. There are three new sunspots emerging from the east farside. NOAA/SWPC forecasters estimate low 5% chances of M-class events.
The geomagnetic field has been at quiet levels for the past 24 hours. ACE spacecraft measured solar wind speed of 350 km/s on December 22 at 21:59 UTC. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 169 pfu. High speed solar wind stream emanated from a coronal hole visible at central meridian and some unsettled to active conditions are expected on December 26.
NOAA/SWPC forecasters estimate a 10% to 20% chance of polar geomagnetic storms on December 24 caused by corotating interaction region – a boundary between fast and slow-moving streams in the solar wind. It is expected that Earth will cross through that region on Christmas Eve.
Featured image: Latest AIA 304 image ((Courtesy of NASA/SDO and the AIA, EVE, and HMI science teams))
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