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.


The level of the solar flaring activity is extremely low, with no reports
of C-class and even B-class flares. The last reported flare (B-class or
stronger) was B1.0 flare on September 11. We expect such a low lever of
activity to persist in the coming hours.
During last 24 hours we did not observe signatures of the possibly Earth
directed CMEs, and the solar protons remained at the background level.

The Earth is still inside the slow solar wind with the speed of about 330
km/s, and the interplanetary magnetic field magnitude is 3 nT. The
geomagnetic conditions are presently quiet and we expect them to stay so in
the coming hours. We can expect unsettled geomagnetic conditions late on
September 22 due to expected 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]

Science Highlights

click here for all science highlights


Click here for all the press releases

Good to know