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


The solar activity has been quiet over the past 24 hours. A relatively
small bipolar sunspot emerged on the solar disc (Catania sunspot group 21),
but does not show any strong activity so far. The X-ray flux remained below
B-level. Solar activity is expected to remain at low levels for the next 24

No Earth directed coronal mass ejections (CME) were observed over the last
24 hours in the available coronagraph imagery. The greater than 10 MeV
proton flux remained at background levels over the past 24 hours and is
expected to remain at low levels. 

The solar wind speed varied between 315 km/s and 420 km/s (ACE). The
magnetic field showed some enhancement with Bz that varied between -8 nT
and +9 nT and the total interplanetary magnetic field between 2 nT and 10
nT. The solar wind parameters might remain slightly enhanced for the coming
days due to the possible effect of the South pole coronal hole wind

Quiet to unsettle geomagnetic conditions were observed with short period of
active conditions, with the Kp index (NOAA) ranging between 1-3 and the
local K index (Dourbes) ranging between 1-4 over the past 24 hours.

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 Jul 17 1206 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2019 Jul 09 0801 UTC
A shock in the solar wind was detected on June 8 at 18:38 UT. The magnetic [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]