Welcome to the homepage of the Solar Influences Data Analysis Center - SIDC.

The SIDC is the solar physics research department of the Royal Observatory of Belgium.
Its operational activities include the World Data Center for the sunspot index and the Regional Warning Center Belgium for space weather forecasting.

Latest News

Feb 02, 2010 : PROBA2: witnesses an annular eclipse

Jan 31, 2010 : PROBA2: press release webbased document/pdf-file

Jan 21, 2010 : PROBA2: a new eye on the Sun/een oog op de Zon

Dec 14, 2009 : The Fingerprint of the New Solar Cycle

Nov 27, 2009 : The Sun is NOT dead/De Zon is NIET dood

click here for all SIDC news items

PRESTO FROM SIDC - RWC BELGIUM Tue Feb 9 2010, 1351 UT

The radiation level of NOAA AR 1045 (Catania 40) has decreased a little. Today, only C-flares occurred. We expect the CME associated with the M6.4 flare of Feb 07, peaking at 02:39UT to arrive late this evening, early tomorrow. A second CME associated with the flaring activity on Feb 08, will arrive one day later. Minor storm conditions are possible.

Most recent alerts

2010 Feb 08 1425 UTC
NOAA AR 1045 released on Feb 08 3 more M-flares:
an M4.1 flare peaking [more]

2010 Feb 06 0917 UTC
END OF ALL QUIET ALERT ...................... The SIDC - RWC Belgium expects [more]

2008 Jul 14 1509 UTC
We stop our automatic geomagnetic service due to K Dourbes problems. Sorry [more]

2008 Jun 14 2355 UTC
The MAK model forecasts a K-index of 6 [more]