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 three active regions, all with alpha configuration of the
photospheric magnetic field, presently observed on the visible side
of the solar disc. Solar activity is low and only few B-class flares were
reported during last 24 hours. We expect solar flaring activity to remain
on the same level in the coming hours.
No Earth directed CMEs have been observed in the past 24 hours.

Solar wind speed decreased to value of about 450 km/s, and the
interplanetary magnetic field magnitude remains on the level of 5nT. During
last 48 hours geomagnetic conditions were mostly quiet to unsettled and we
expect them to stay so in the coming hours.

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 Apr 22 0840 UTC
The high speed stream from the equatorial extension of the southern coronal [more]

2017 Apr 03 1504 UTC
A class M5.8 solar X-ray flare occurred on 2017/04/03 with peak time 14:29UT [more]

2016 Nov 05 1349 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2016 Jul 05 2210 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

Apr 26, 2017: Works in progress!...

Apr 20, 2017: Impressive solar eruption

Apr 11, 2017: Airplane transits the Sun!

Apr 05, 2017: M-class flares à volonté!

Mar 29, 2017: C-class flares at last!

click here for all science highlights


Oct 26, 2016: High-speed solar wind causes major geomagnetic storm (NL-FR-EN)

May 04, 2016: Mercury Transit

Mar 23, 2016: STCE 10 years - Happy Birthday!

Click here for all the press releases

Good to know


14th European Space Weather Week

Topical Issue for the SWSC Journal