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


Solar activity has been very low over the past 24 hours. Catania region 7
(NOAA AR 12833) is rotating on the western solar hemisphere. A northern
active regions has rotated on the visible disk, while a southern one is
about to do so. The solar activity is expected to remain at low levels over
the next 24 hours.

No Earth-directed coronal mass ejections have been confirmed in the
available coronagraphic imagery.

The greater than 10 MeV proton flux was at background levels in the past 24
hours, and is expected to stay at nominal levels in the next 24 hours. The
greater than 2 MeV electron flux dropped below the 1000 pfu alert threshold
at about Jun-21 23:00UT. It is expected to remain at about those levels
during the next 24 hours. The 24h electron fluence was at moderate levels
and is expected to be at normal to moderate over the next 24 hours.

The solar wind speed fluctuated between 320 to 395 km/s over the past 24
hours while the total magnetic field strength had values between 3 to 9 nT.
The values of the Bz component varied between -7 and +7 nT. The
interplanetary magnetic field phi angle was predominantly on the negative
sector (directed towards the Sun). A small disturbance caused a drop on the
Bz with a short-lived switch on the phi angle and unsettled conditions at
about  Jun-22 02:00UT. Bz had smoothly transitioned to background level by
04:00UT. Any effects from the high speed stream from the extension of the
Northern negative polarity Coronal Hole (CH) or the southern positive CH
could be expected in the next 24 hours. 

Geomagnetic conditions were at quiet to unsettled levels (NOAA Kp and K
Dourbes 1-3) over the past 24 hours, associated with the aforementioned
distubance. Quiet to unsettled conditions are expected over the next 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

2021 Jun 19 1009 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2021 Jun 02 1826 UTC
At 12:20 UT on June 02, a solar wind shock was observed in the solar wind [more]

2021 Mar 18 0131 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]