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.


There are no numbered sunspot groups observed on the visible side of the
Sun, and there were no flares reported during last 24 hours. We expect such
a quiet flaring conditions to persist in the coming hours.
During last 24 hours we did not observe any signatures of the possibly
Earth directed CME and the solar protons remained at the background level.

The solar wind speed is presently about 450 km/s and the interplanetary
magnetic field is 9 nT.
This morning, at about 04:00 UT, the in situ observations showed change of
the phi angel followed by the increase of the interplanetary magnetic field
magnitude, solar wind speed and temperature. All this indicate possible
arrival of the fast solar wind associated with negative equatorial coronal
During last 24 hours, minor storm geomagnetic conditions were reported.
Local station at Dourbes reported intervals of K=5 lasting from about 21:00
UT until the midnight on September 22, while NOAA reported long interval of
Presently geomagnetic conditions are quiet to unsettled. In the coming
hours we might expect unsettled to active geomagnetic conditions (isolated
intervals of the minor storm conditions are also not excluded), due to the
possible arrival of the fast solar wind.

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 Sep 11 1017 UTC
Geomagnetic conditions have reached moderate storm levels on a planetary [more]

2018 Aug 18 1222 UTC
END OF ALL QUIET ALERT ...................... The SIDC [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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