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.


Solar activity was at low levels. Catania sunspot group 82 (NOAA AR 2710)
produced one B2.8 flare peaking at 05:07 UT today. No earth-directed
coronal mass ejections (CMEs) were observed in available coronagraphic
imagery. The greater than 10 MeV proton flux was at nominal levels. Solar
activity is expected to be at low levels with some probability for C-class
The solar wind speed remained below 400 km/s over the past 24 hrs.
Interplanetary magnetic field magnitude remained below 5 nT till 11:00 UT
today (recorded by ACE). Later interplanetray magnetic filed magnitude
gradually increased till 9 nT, simutaniously Bz component decreased from -2
nT till -5 nT. Solar wind parameters variations may increase from now due
to the expected influence of the recurrent positive polarity northern polar
coronal hole. Solar wind speeds may increase till about 500 km/s later
today or tomorrow (accodring to STEREO data). Geomagnetic conditions have
been quiet over the past 24 hrs. Unsettled geomagnetic conditions can be
expected today and tomorrow. Isolated episodes of active conditions are
also not excluded.

Latest SWAP image

SWAP latest image

Latest USET H-alpha image
USET latest Halpha image

Latest LYRA curve

Latest LYRA Curves

Latest Callisto Observations

Latest HUMAIN Callisto qkl

Daily estimated sunspot number

Most recent alerts

2018 May 15 1356 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2018 May 06 0934 UTC
Geomagnetic activity has reached moderate storm levels with an episode [more]

2018 May 04 1644 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2017 Sep 10 1650 UTC
A class X8.9 solar X-ray flare occurred on 2017/09/10 with peak time 16:06UT [more]

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