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


Over the past 24 hours solar activity has been very low. The visible solar
disc was spotless and no significant flares have been recorded. No Earth
directed Coronal Mass Ejections (CMEs) have been detected in the available
coronagraph imagery. The greater than 10MeV proton flux remained at
background levels over the past 24 hours. Solar activity is expected to
remain very low over the next 24 hours.

The solar wind was at background levels over the last 24 hours, gradually
increasing over the period from 300 km/s to 340 km/s. The total magnetic
field strength fluctuated between 0.2 and 4.9 nT. The Bz component ranged
between approximately -4 and +3.5 nT. 

Geomagnetic conditions have been quiet to unsettled over the past 24 hours,
with Kp index (NOAA) ranging between 0-2 and local K index (Dourbes)
ranging between 0-2, with one short interval of K equal to 3 at 18 UT on 25
May. Quiet geomagnetic conditions are expected over the next 24 hours.
Active intervals (K Dourbes = 4) are possible on May 28, due to the
expected arrival of a high speed solar wind stream associated with a
recurring, negative polarity equatorial coronal hole which began to
traverse the central meridian on 24 May.

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 May 20 1412 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2019 May 14 0900 UTC
NOAA Kp is currently equal to 6 (moderate geomagnetic storm, between 3h [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]