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.
Dec 01, 2015 : Space Weather - Belgian wins an award


Solar activity has been low over the past 24 hours. The largest flare was a
C3.6 class flare. NOAA Active Region (AR) 2458 (Cao Beta) has produced most
of the activity, including the C3.6 flare peaking at 08:10 UT. Both ARs
2458 and 2459 have shown some evidence of flux emergence and have the
potential to produce more activity. ARs 2457 and 2461 have rotated onto the
West limb.  The above-mentioned C3.6 flare has shown evidence of an
associated EUV wave and coronal dimmings, indicating an associated
eruption. There are currently no Coronagraph observations to verify this,
but the source region is in a location likely to produce an Earth directed
CME. A PRESTO will be issued once/if the presence of an associated CME is
The solar wind speed has fluctuated around 500 km /s over the past 24
hours. The total magnetic field has remained around 5 nT over the past 24
hours. The Bz component has oscillated between +5 and -5 nT. Geomagnetic
conditions were quiet to moderate over the past 24 hours (NOAA Kp 1-3,
local K Dourbes 1-3). There is currently a large positive polar coronal
hole and smaller positive transient coronal hole at lower latitudes on the
Sun which are probably the source of enhanced solar wind conditions at the
Earth, the continued presence of these regions in the Western hemisphere
may enhance solar wind conditions at the Earth over the next day.
Geomagnetic conditions are expected to be quiet to unsettled. 

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

2015 Nov 30 1302 UTC
A partial halo CME with a speed of 370 +/- 92 km/s was detected by CACTUS [more]

2015 Nov 29 1949 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2015 Oct 02 0048 UTC
A class M5.5 solar X-ray flare occurred on 2015/10/02 with peak time 00:13UT [more]

2015 Jun 02 0746 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

Dec 02, 2015: Happy Birthday SOHO!

Nov 17, 2015: A filament kisses the Sun goodbye!

Nov 11, 2015: Strong radio event on 04 November

Nov 03, 2015: Proton event!

Oct 27, 2015: Connected

click here for all science highlights


Dec 01, 2015 : Space Weather - Belgian wins an award

Nov 21, 2015 PV: Can the sun cause radar blackouts disrupting air traffic? - ESWW12

Aug 18, 2015 DB: The Sunspot Number, the "longest ongoing scientific experiment" revisited

Click here for all the press releases

Good to know

ASGARD - Balloons for science : Project call

ESWW12 - Early bird registration until October 1