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


During last 24 hours, solar flaring activity was low, without any flares
reported. We expect a low level of flaring activity in the coming hours.
Isolated B-class flares are possible, while C-class flares are possible but
not probable. During last 24 hours there were no Earth directed CMEs and
the solar protons remained at the background level.

The in situ observations show clear signatures of the solar wind
originating from the negative polarity coronal hole. It is however, not
possible to specify if the source was the extension of the southern polar
coronal hole or the small equatorial coronal hole as they both have
negative polarity. The solar wind speed is presently 400 km/s and the
interplanetary magnetic field magnitude is about 4 nT. 
The arrival of solar wind originating from the coronal hole induced active
geomagnetic conditions. The local station at Dourbes reported interval of
K=4 from about 21:00 UT until the 24:00 UT on May 30, while NOAA reported
only longer interval of Kp=3. We expect quiet to unsettled geomagnetic
conditions in the coming 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

2020 May 29 1219 UTC
END OF ALL QUIET ALERT ...................... The SIDC [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]