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) 2016 Sep 27
19:46:07

The arrival of the fast solar wind, from the coronal hole in the northern
hemisphere with a long latitude extension, has induced disturbed
geomagnetic conditions this evening. The combination of the fast solar wind
(speed of about 600 km/s) and the intervals of the negative value of the Bz
component of the interplanetary magnetic field (down to -9 nT), has caused
the moderate storm conditions. The Potsdam station reported K=6, and NOAA
reported Kp=6. We expect disturbed geomagnetic conditions to continue in
the coming hours.

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Daily estimated sunspot number
EISN

Most recent alerts

2016 Sep 27 1946 UTC
The arrival of the fast solar wind, from the coronal hole in the northern [more]

2016 Sep 06 1458 UTC
The Halo CME alert issued by CACTus on 2016 Sep 06 1344 UTC was false. [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

Sep 20, 2016: Farside eruption

Sep 12, 2016: Collateral damage

Aug 30, 2016: Resuscitating STEREO-B

Aug 11, 2016: Sun-grazing comet mystery

Jul 26, 2016: A spectacular flare

click here for all science highlights

Press

May 04, 2016: Mercury Transit

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

Jan 15, 2016: Space Technology & Calibration Laboratories

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