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.


There are no sunspot regions on the visible hemisphere of the Sun and
flaring level is very low. The chance for a C flare in the next 24 hours is
estimated at 5%. 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 wind speed measured by DSCOVR was between about 520 and 670 km/s in
the past 24 hours, with current values around 570 km/s. The Interplanetary
Magnetic Field (IMF) was directed towards the Sun and its magnitude varied
between about 2 and 8 nT. Bz was never below -5.5 nT. This enhanced solar
wind is indicative of a negative coronal hole high speed stream. Quiet to
active geomagnetic conditions (K Dourbes between 2 and 4; NOAA Kp between 2
and 5) were registered in the past 24 hours. Quiet to active levels (K
Dourbes < 5) are possible on February 19, 20 and 21 due to the influence of
the high speed stream associated with a negative coronal hole, with a
chance for minor storm conditions (K Dourbes = 5).

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 Feb 15 1051 UTC
In-situ observations (from DSCOVR satellite) indicate the arrival of an [more]

2018 Feb 05 0615 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2017 Sep 17 1959 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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