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 low levels in the past 24 hours. NOAA Active Region
(AR) 2786 (Beta-Gamma) produced multiple B and low-level C-class flares.
NOAA AR 2785 (Beta) developed trailer spots and showed signs of flux
emergence. NOAA AR 2783 exhibited some decay and is now an Alpha region.
The newly numbered NOAA AR 2787 (N30E60, Catania sunspot group 58) which
has recently rotated onto the solar disk has magnetic type Alpha and was
quiet. The solar activity is expected to remain at low levels with a high
chance for C-class flares, particularly from NOAA AR 2786. An isolated
M-class flare also remains possible.

No Earth directed CMEs have been detected in the available coronagraphic

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours and is expected to remain so in the next 24 hours. The greater than 2
MeV electron flux exceeded the 1000 pfu alert threshold between 13:00 and
20:40 UT Nov 27. During the next 24 hours, the electron flux is expected to
exceed the 1000 pfu level again. The 24h electron fluence was at moderate
levels and is expected to be at normal to moderate levels over the next 24

Over the past 24 hours, the solar wind speed ranged between 390 and 490
km/s (DSCOVR). The total magnetic field strength had a maximum value of 6
nT. Bz had a minimum value of -5 nT. The interplanetary magnetic field was
predominantly directed away from the Sun (phi angle in the positive
sector). Over the next 24 hours, the solar wind parameters are expected to
return to nominal conditions as the influence of the extension to the
northern polar Coronal Hole (CH) dwindles. 

Geomagnetic conditions were at quiet to unsettled levels over the past 24
hours (NOAA Kp and local k Dourbes recorded values of 1-3 and 0-3,
respectively).  Geomagnetic conditions are expected to continue at quiet to
unsettled levels for the next 24 hours and then return to quiet levels as
the influence of the CH passes.

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 Nov 25 0908 UTC
SoHO/LASCO C2 images show an asymmetric full halo CME from 12:48 UT Nov [more]

2020 Nov 20 1947 UTC
END OF ALL QUIET ALERT ...................... The SIDC [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]