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.

FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) 2016 Dec 09

Due to the presence of a large negative polarity Southern polar
trans-equatorial coronal hole. Enhanced solar wind conditions are expected,
which may generate geomagnetic storm conditions of K > 5. As a consequence
Geomagnetic conditions are expected to be unsettled to active for the next
couple of days. PRESTO alerts will be issued if K exceeds 5.

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

2016 Dec 09 2317 UTC
Due to the presence of a large negative polarity Southern polar trans-equatorial [more]

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

2016 Jul 24 0516 UTC
A class M5.5 solar X-ray flare occurred on 2016/07/23 with peak time 05:31UT [more]

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

Science Highlights

Dec 05, 2016: PROBA2's 45 X-class flares

Nov 29, 2016: First radio burst for ARCAS

Nov 07, 2016: SC24 and the NOAA-scales

Nov 04, 2016: The Sun 10 years in STEREO

Oct 28, 2016: The title of ‘Corresponding Astronomer’ goes to ….

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

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The first Early-Career Day

ASGARD: balloons for science