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 and ACE) gradually increased from
about 405 to 550 km/s in the past 24 hours. The Interplanetary Magnetic
Field (IMF) was directed mainly toward the Sun and its magnitude ranged
between about 2 and 11 nT. Bz was variable and dived below -5 nT several
times, with a minimum of about -8 nT. On February 23, 24 and 25 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 to active geomagnetic conditions (K Dourbes between 1 and 4; NOAA Kp
between 2 and 5) were registered in the past 24 hours. Quiet to active
geomagnetic levels (K Dourbes < 5) are expected for February 23, 24 and 25,
with a chance for minor storm intervals (K Dourbes = 5) 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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