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


The solar activity has been quiet over the past 24 hours, with the X-ray
flux remaining below B-class level. The solar disk remains spotless
although there is a plage region in the north-east quadrant of the solar
disk, which used to be AR2733. Quiet conditions are expected to continue
over the next 24 hours.

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 and is expected to remain so.

Over the last 24 hours the solar wind has returned to ambient conditions
with the speed decreasing from approximately 490 to 350 km/s. The total
magnetic field strength remained below 4.2 nT, while the Bz component
fluctuated between -2.8 and 2.5 nT. The phi angle remained negative over
the last 24 hours. The leading edge of a small patchy coronal hole with
positive polarity reached the central meridian in the last few hours. The
ambient solar wind conditions are expected to continue over the next 24

The geomagnetic conditions were quiet over the last 24 hours, with the Kp
(NOAA) and the local K (Dourbes) indices ranging between 0-1. The
geomagnetic conditions are expected to continue to be quiet over the next
24 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

2019 Feb 16 1225 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2018 Nov 05 1320 UTC
Geomagnetic conditions have reached moderate storm levels on a planetary [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]