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. The sun is
currently spotless and the X-ray flux remained below B-level. Solar
activity is expected to remain at low levels for the next 24 hours.

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 parameters show some enhancements starting from August 20,
around 01:00 UT: The wind speed increased from 315 km/s to 425 km/s, the
total interplanetary magnetic field reached 10 nT, and the Bz component
varied between -7 nT and +7 nT (as recorded by ACE). The solar wind
parameters may remain slightly enhanced for the next period due to the
effect of a southern coronal hole of negative polarity that was facing
Earth on August 18 in about two days.

Mostly quiet geomagnetic conditions were observed, Dourbes observed
unsettled conditions (K=3) that can be associated with the effect of the
southern coronal hole. Quiet to unsettled conditions are expected for the
next period, with small chances of short periods of active conditions. 

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 Aug 08 1226 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]