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.


Both sunspot groups, which were observed on the visible side of the solar
disc during last 24 hours, are decaying. Solar flaring activity was low and
will remain so in the coming hours with very low probability for C-class
flares (about 5%).
There were no Earth directed CMEs observed since last report, and the solar
protons remained at background level.

The Earth is within the slow solar wind (speed of about 360 km/s) and the
interplanetary magnetic field magnitude is very low presently amounting
about 1 nT. 
The fast solar wind associated with the large equatorial coronal hole
(reached central meridian in the early morning of November 16) is expected
to arrive at the Earth later today. The geomagnetic conditions are
presently quiet and we expect unsettled to active geomagnetic conditions
starting from this evening, due to the expected arrival of the fast solar

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

2017 Nov 14 0946 UTC
The in situ observations (from DSCOVR satellite), show sudden increase [more]

2017 Nov 07 0756 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2017 Sep 17 1959 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]

Science Highlights

Nov 17, 2017: A New STAFF

Oct 19, 2017: Something's brewing...

Oct 16, 2017: The best of... 2016!

Oct 11, 2017: The Sun is spotless again!

Oct 04, 2017: A new LYRA product

click here for all science highlights


Sep 28, 2017: Recurrent Coronal Hole

Aug 11, 2017: Eclipse fever

Jun 02, 2017: Extreme Ultraviolet Imager (EUI) ready for launch!

Click here for all the press releases

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