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.


Returning NOAA region 2682 (behind the East limb) produced a long duration
B2.3 flare peaking around 10:30 UT on October 18. The chance for a C flare
in the next 24 hours is estimated at 35%. NOAA 2682 erupted several times
over the past 24 hours. Though data gaps in STEREO A imagery prevented to
see the exact onset of some eruptions on the backside of the Sun, the
events caused CMEs which were observed by LASCO C2 and C3. The two most
significant CMEs (first seen in LASCO C2 images at 5:48 and 6:36 UT,
respectively) were both bright and fast and extended from the northeast to
the southeast, with a core towards the northeast. Since these are backside
events, these CMEs will not be geoeffective. The greater than 10 MeV proton
flux was at nominal levels.
Solar wind speed measured by DSCOVR decreased from about 475 to about 390
km/s in the past 24 hours. The Interplanetary Magnetic Field (IMF) was
predominantlty directed away from the Sun and its magnitude ranged between
about 0 and 4 nT. Quiet geomagnetic conditions (K Dourbes between 1 and 2;
NOAA Kp between 1 and 2) were registered in the past 24 hours. Quiet to
unsettled geomagnetic levels are expected on October 18, 19 and 20.

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 Oct 13 2112 UTC
Due to the expected growth of the solar wind speed till 670 km/s (actual [more]

2017 Oct 11 0614 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

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

Oct 11, 2017: The Sun is spotless again!

Oct 04, 2017: A new LYRA product

Oct 04, 2017: Facing the Sun

Sep 28, 2017: Recurrent Coronal Hole

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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