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 low. The visible solar disc
was spotless and the X-ray flux remained below B-class level. No Earth
directed Coronal Mass Ejections (CMEs) have been detected. The greater than
10MeV proton flux remained at background levels over the past 24 hours.
Solar activity is expected to remain low over the next 24 hours.

The solar wind speed has fluctuated between 355 and 450 km/s over the past
24 hours. The total magnetic field strength fluctuated around 5 nT for much
of the period, with a minimum of 0.6 nT and a maximum of 7.1 nT recorded.
The Bz component was predominantly positive and ranged between -4.8 and
+7.1 nT.

Geomagnetic conditions have been quiet to unsettled over the past 24 hours,
with Kp index (NOAA) and local K index (Dourbes) ranging between 1-2 and
1-3, respectively. Quiet to unsettled geomagnetic conditions are expected
to continue over the next 24 hours, due to the weak solar wind stream
associated with the patchy negative polarity equatorial coronal hole which
began to traverse the central meridian on 18 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]