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.

FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) 2017 May 24
13:22:16

Slow partial halo CME, with projected speed of about 192 km/s and angular
width of about 122 degree, was detected by CACTUS at 05:24 UT on
23-May-2017. The CME first seen as the clear large-scale dimming at EUV
solar disk images (PROBA2/SWAP and SDO/AIA) is associated with an eruption
near solar disk centre. WSA-ENLIL model indicates the possible CME arrival
at Earth around noon on 26-May-2017. Active geomagnetic conditions may be
expected, with an isolated episode of a minor storm.

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USET latest Halpha image

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Daily estimated sunspot number
EISN

Most recent alerts

2017 May 24 1324 UTC
Slow partial halo CME, with projected speed of about 192 km/s and angular [more]

2017 May 15 1231 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2017 Apr 03 1504 UTC
A class M5.8 solar X-ray flare occurred on 2017/04/03 with peak time 14:29UT [more]

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


Science Highlights

Apr 26, 2017: Works in progress!...

Apr 20, 2017: Impressive solar eruption

Apr 11, 2017: Airplane transits the Sun!

Apr 05, 2017: M-class flares à volonté!

Mar 29, 2017: C-class flares at last!

click here for all science highlights

Press

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!

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