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 in the past 24
hours, and is expected to stay at nominal levels in the next 24 hours.

The solar wind speed (recorded by DSCOVR) varied between about 380 and 430
km/s in the past 24 hours, with current values around 405 km/s. The
Interplanetary Magnetic Field (IMF) was directed mainly toward the Sun and
its magnitude ranged between about 1 and 10 nT. Bz had excursions below -5
nT between 07:40 and 09:30 UT on February 22. On February 22, 23 and 24 the
solar wind is expected to be at nominal levels, possibly with occasional
periods of enhanced solar wind as the Earth comes close to the high speed
stream associated with the negative polarity south polar coronal hole.

Quiet geomagnetic conditions (K Dourbes between 1 and 2; NOAA Kp between 1
and 2) were registered in the past 24 hours. Quiet to unsettled geomagnetic
levels (K Dourbes < 4) are expected on February 22, 23 and 24, with a
chance for active intervals (K Dourbes = 4) when the Earth comes close to
the high speed stream associated with the negative polarity south polar
coronal hole.

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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