Welcome to the Solar Influences Data Analysis Center (SIDC), which is the solar physics research department of the Royal Observatory of Belgium. The SIDC includes the World Data Center for the sunspot index and the ISES Regional Warning Center Brussels for space weather forecasting.


Newly numbered Catania sunspot group 84 rotating around the East limb
produced multiple B flares yesterday. The largest flare was a C2.0 flare
peaking at 18:21 UT. NOAA Active Regions 2710 and 2711 were mostly
inactive. No earth-directed coronal mass ejections (CMEs) were observed in
available coronagraphic imagery. The greater than 10 MeV proton flux was at
nominal levels. Solar activity is expected to be at low levels with some
probability for C-class flares.
Solar wind parameters decreasing varitations indicate fainting influence of
positive polarity extension of the northern polar coronal hole. Solar wind
speed gradually decreased during the period till around 470 km/s after
reaching maximum of 550 km/s at 17:00 UT yesterday. Total magnetic field
magnitude declined from 6.5 to 2 nT, while Bz component is varying now
between -1.7 and +1.7 nT. Geomagnetic conditions reached unsettled levels
(K= 3) during 06 - 15 UT yesterday, then both local index (Dourbes) and
planetary (NOAA) returned to quiet levels. Mainly quiet geomgnetic
conditions can be expected from now.

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

2018 May 15 1356 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2018 May 06 0934 UTC
Geomagnetic activity has reached moderate storm levels with an episode [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]

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