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.


Solar activity was very low with no significant flaring and X-ray flux at
background values.
NOAA region 2638 (Catania 95 and 96) and NOAA region 2639 (Catania 97) were
stable. Additional spot formation was recorded in Catania group 98 (now
numbered as NOAA region 2640).
X-ray flux is expected to remain at background level.
No Earth directed CMEs have been recorded in coronagraph data.
The transequatorial extension of the negative polarity southern polar
coronal hole has transited the central meridian overnight. It is expected
to become geoeffective around midnight February 28 / March 1.
Proton flux values are at background levels and expected to remain so.

Solar wind showed the continued recovery towards nominal conditions. Solar
wind speed declined from around 500 km/s to around 430 km/s. Total magnetic
field was in the 3-5nT range.
Solar wind is expected to be at nominal levels over the next 48 hours
before an anticipated increase late February 28 due to high speed stream
from the negative polarity coronal hole.
Geomagnetic conditions have been quiet to unsettled (local K Dourbes 0-3,
NOAA Kp 1-2).
Over the next days, geomagnetic conditions are expected to be quiet to
unsettled and increasing to quiet to active by late February 28 with the
anticipated high speed stream.

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

2017 Feb 02 1139 UTC
A partial halo CME is visible in SoHO/LASCO C2 images from 15:24 UT onwards [more]

2016 Nov 05 1349 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2016 Jul 24 0516 UTC
A class M5.5 solar X-ray flare occurred on 2016/07/23 with peak time 05:31UT [more]

2016 Jul 05 2210 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

Feb 23, 2017: A stretched coronal hole

Feb 01, 2017: STCE Workshop

Jan 27, 2017: The Moon in sight

Jan 24, 2017: Low 10.7 cm radio flux

Jan 16, 2017: RoboSWOP in a space game EUFHORIA looking for sunspot treasures

click here for all science highlights


Oct 26, 2016: High-speed solar wind causes major geomagnetic storm (NL-FR-EN)

May 04, 2016: Mercury Transit

Mar 23, 2016: STCE 10 years - Happy Birthday!

Click here for all the press releases

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