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


There are presently several active regions observed on the visible side of
the Sun, majority of them have very simple configuration of the
photospheric magnetic field. The most complex one is Catania sunspot group
87 (NOAA AR 2816) which has beta configuration of its photospheric magnetic
Solar flaring activity is low, with only few B-class and no C-class flares
reported during last 24 hours. Majority of the observed flares originated
from the active region that is rotating from behind of the East solar limb.
This region was also source of the fast CME reported yesterday. We expect
such a low level of flaring activity to persist in the coming hours, with
an isolated C-class flares possible but not very probable.
During last 24 hours no Earth directed CMEs were observed in coronagraph
data, and the proton flux levels remained at background values. 

The greater than 2MeV electron flux crossed the 1000 pfu threshold this
morning and it is expected to remain above the threshold for long periods
throughout April 19th. 

The high solar wind speed and the longer interval of the negative value of
the Bz componente of the interplanetary magnetic field induced active
conditions  The local station at Dourbes reported longer interval of the
Kp=4 at around midnight, while NOAA reported also several intervals of the
Planetary K-index, K=4.
The solar wind speed is still high and longer intervals of the negative Bz
component of the interplanetary magnetic field might result in disturbed
geomagnetic conditions, with active to minor storm conditions possible in
the coming 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

2021 Apr 15 0946 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2021 Apr 14 0853 UTC
A faint and slow partial halo CME is observed by LASCO C2 and C3 coronagraphs [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]