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.


Solar activity was very low with no C class flares. NOAA active regions
(ARs) 2638, 2639 and 2640 were stable. X-ray flux is expected to remain at
background level. No Earth directed CMEs have been recorded in coronagraph
data. The transequatorial extension of the negative polarity southern polar
coronal hole is expected to become geoeffective around midnight
28-Feb-2017/01-March-2017. Proton flux values are expected to remain at
background levels.
Solar wind speed declined from around 450 km/s to around 350 km/s. Total
magnetic field was in the 3:6nT range. Bz was in the -3:4nT range. Solar
wind is expected to be at nominal levels over the next 24 hours before an
anticipated increase late 28-Feb-2017 due to high speed stream from the
negative polarity coronal hole. Geomagnetic conditions have been quiet
(local K Dourbes 0-2, NOAA Kp 1-2). Over the next days, geomagnetic
conditions are expected to be quiet to unsettled and increasing to quiet to
active by late 28-Feb 2017 with the anticipated high speed stream.

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 Feb 02 1139 UTC
A partial halo CME is visible in SoHO/LASCO C2 images from 15:24 UT onwards [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

Feb 23, 2017: A stretched coronal hole

Feb 01, 2017: STCE Workshop

Jan 27, 2017: The Moon in sight

Jan 24, 2017: Low 10.7 cm radio flux

Jan 16, 2017: RoboSWOP in a space game EUFHORIA looking for sunspot treasures

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

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ESWW14 - call for sessions

Three Topical Issues for the SWSC Journal