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


Solar activity was at very low levels. The visible solar disk was spotless.
No earth-directed coronal mass ejections (CMEs) have been observed in the
available coronagraphic imagery. The greater than 10 MeV proton flux was at
nominal values. Solar activity is expected to remain at very low levels.

The solar wind speed gradually increased from 320 km/s to 390 km/s (ACE).
The interplanetary magnetic field (phi angle) was predominantly directed
towards the Sun (negative sector), with some short intervals in the
positive sector.  Bz varied between -4 and +4 nT.

Geomagnetic activity was quiet, with the Kp index (NOAA) and the local k
index (Dourbes) recording values of between 0-2. Quiet conditions are
expected on Dec 6 and 7 with possible unsettled conditions from Dec 8, due
to the influence from the patchy negative polarity coronal hole that
traversed the central meridian on Dec 5.

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

2019 Nov 22 1147 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2019 Oct 25 0924 UTC
Geomagnetic conditions have reached moderate storm levels (NOAA Kp=6 for [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]