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


Solar flaring activity was at very low levels. No significant flares have
been recorded. A small coronal hole began to transit the central meridian
on Mar 31 20:00 UT. Solar activity is expected to remain at very low

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

The greater than 10 MeV proton flux was at nominal levels over the past 24
hours and is expected to stay at nominal levels for the next 24 hours. The
greater than 2 MeV electron flux was at moderate levels over the past 24
hours and is expected to increase further in the coming days.

The solar wind speed near Earth gradually decreased over the past 24 hours,
with values ranging from 450 to 535 km/s (DSCOVR). The Interplanetary
Magnetic Field (IMF) was predominantly oriented towards the Sun (phi angle
in the negative sector). The magnitude of the magnetic field varied between
0 and +7 nT. Bz ranged between -5 and +4 nT. 

Quiet to unsettled geomagnetic conditions were registered for the past 24
hours (K Dourbes recorded values 0-3 and NOAA Kp 2-3). Quiet to unsettled
(K Dourbes = 3) geomagnetic conditions are expected for the next 24 hours,
due to remaining effects of the coronal hole that crossed the central
meridian on Mar 26.

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

2020 Feb 20 1308 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]