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


There are no active regions visible on the solar disk. No C-class flares in
past 24 h. Solar activity is expected to remain at low levels.
No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar
protons have remained at background levels over the past 24 hours.

The solar wind speed is at 330 km/s with interplanetary magnetic fields of
8 nT. Geomagnetic conditions have been quiet. A sector boundary crossing
occurred around 07:00 UT, the interplanetary magnetic field polarity
changed from negative to positive. The solar wind speed started increasing
since then, marking the late arrival of the high speed solar wind stream
associated with the low latitudinal extension of the northern polar coronal
hole coming to Earth. The effect is expected to be weak, producing up to
active periods. A patchy negative polarity coronal hole traversed central
meridian yesterday, its associated high speed stream will affect the Earth
around October 24.

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

2018 Oct 16 0922 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2018 Oct 07 1127 UTC
The compression region in front of the fast solar wind stream expected [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]