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 is one active region on the disc, NOAA AR 2706 with beta magnetic
field configuration. No C-class flares in past 24 h, but they remain

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar
protons have remained at background levels over the past 24 h.

The solar wind speed at L1 is at 350 km /s with interplanetary magnetic
field magnitude of 5 nT. Geomagnetic conditions are quiet, the fast solar
wind related to the southern extension of the northern polar coronal hole
can affect the Earth in about 24 h and cause active geomagnetic conditions 
(although it may pass north of the Earth).

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 Apr 20 1041 UTC
Long intervals of negative values of Bz component of the interplanetary [more]

2018 Apr 17 1201 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

click here for all science highlights


Click here for all the press releases

Good to know