The SIDC is part of the Royal Observatory of Belgium and a partner in the Solar Terrestrial Center of Excellence (STCE).


The Sun is spotless and did not produce any B flares or brighter in the
past 24 hours. The chance for a C flare in the next 24 hours is estimated
at only 2%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available
coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed near Earth as registered by DSCOVR varied between
about 390 and 455 km/s in the past 24 hours. The Interplanetary Magnetic
Field (IMF) was predominantly directed towards the Sun and varied between
about 2 and 8 nT. Bz was never below -6 nT. Solar wind speed is expected to
decrease on December 18 and may increase again to moderate values on
December 19 due to the solar wind stream from an isolated negative polarity
coronal hole.

Quiet geomagnetic conditions (K Dourbes between 1 and 2; NOAA Kp between 1
and 3) were registered in the past 24 hours. There is a chance for active
intervals (K Dourbes = 4) on December 18 and 19. Quiet to unsettled
geomagnetic levels (K Dourbes < 4) are expected on December 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

2018 Dec 18 1058 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2018 Nov 05 1320 UTC
Geomagnetic conditions have reached moderate storm levels on a planetary [more]

2018 May 04 1644 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]