Welcome to the Solar Influences Data Analysis Center (SIDC), which is the solar physics research department of the Royal Observatory of Belgium. The SIDC includes the World Data Center for the sunspot index and the ISES Regional Warning Center Brussels for space weather forecasting.

FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) 2014 Sep 01
14:31:06

Six sunspot groups were reported by Catania today. The most active of them
is the Catania sunspot group 36 (NOAA AR 2149) that produced seven C-class
flares yesterday (including C7.1 flare peaking at 12:11 UT) and two C-class
flares today (C2.1 peaking at 07:44 UT and C1.4). We expect more flaring
activity on the C-level from this sunspot group, as well as from the
Catania sunspot group 40 (NOAA AR 2152) that has beta-gamma configuration
of its photospheric magnetic field. An isolated M-class flare is possible
but unlikely. A long filament in the northern hemisphere has been crossing
the solar central meridian since yesterday. In case of its eruption, a
possible Earth-directed CME may result. Two partial halo CMEs were detected
today, first appearing in the SOHO/LASCO C2 field of view at 00:36 and
09:24 UT respectively. Their angular widths were similar (around 150 and
130 degrees respectively), as well as were their shapes, although the first
one was significantly weaker than the second one. Both CMEs seem to result
from activity in the active region on the far side of the Sun (around
N10W130) as observed by STEREO/EUVI, so none of them is expected to arrive
at the Earth. 
The Earth is currently inside a slow (around 420 km/s) solar wind flow with average (around 5 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.

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2014 Sep 01 1432 UTC
Six sunspot groups were reported by Catania today. The most active of them [more]

2014 Aug 29 1853 UTC
The latest halo CME alert, with first measurement of the CME on August [more]

2014 Aug 08 1211 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]


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