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


Solar activity was at very low levels. The Sun is still spotless. A small
active region close to the east limb at latitude S10 seems spotless,
whereas another small region at latitude N25 is still at the east limb as
seen in SDO/AIA imagery. No earth-directed coronal mass ejections (CMEs)
have been observed in available coronagraphic imagery. The greater than 10
MeV proton flux was at nominal values. A small and irregularly shaped
equatorial negative polarity coronal hole (CH) is present on the solar

Solar activity is expected to remain at very low levels.

Solar wind conditions were at background levels. Solar wind speed declined
from about 380 km/s at the beginning of the period to 330 km/s by 06:30UT,
then increasing again to its current value around 350 km/s(ACE). Bz
undulated between -4 and +4 nT. The direction of the interplanetary
magnetic field (phi angle) was mainly towards the Sun until around 06:30UT,
when it switched towards predominantly a positive sector (away from the
Sun). Geomagnetic conditions were at quiet levels, with an unsettled
episode (09-12UT) recorded at Dourbes.

Geomagnetic activity is expected to be mostly at quiet levels, with an
isolated unsettled interval remaining possible. Late on 29 February or
during 01 March, geomagnetic conditions may become unsettled with a chance
on an active episode following the expected arrival of a wind stream
associated with the negative polarity CH.

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 Feb 20 1308 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [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]