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 wind speed first reached about 430 km/s and then slowly decreased to
about 380 km/s, the total interplanetary magnetic field remained below 5
nT, and the Bz component varied between -4 nT and +4 nT (as recorded by
ACE). The solar wind parameters may show some minor enhancement for next
period due to the possible effect of a southern coronal hole of negative
polarity that was facing Earth on August 18.

Quiet geomagnetic conditions were observed. Quiet conditions are expected
for the next period, with small chances of short periods of 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

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]