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

Nov 13, 2009 : Sixth European Space Weather Week: Press Release

Nov 09, 2009 : Debate: Space Wheater and the Earth's Climate

Oct 27, 2009 : Launch-Lancering-Lancement PROBA2

Sep 10, 2009 : The European Space Weather Week

Jul 31, 2009 : Where to find sunspot data

click here for all SIDC news items

PRESTO FROM SIDC - RWC BELGIUM Mon Nov 23 2009, 1225 UT

Catania sunspot group 28 (NOAA AR 1033) and NOAA H-alpha plages 1031 and 1032 are too weak to produce a noticeable flare. Solar activity is thus expected to remain quiet.
A low-latitude coronal hole in the southern hemisphere reached the solar central meridian yesterday. We expect a fast solar wind stream from this coronal hole to arrive to the Earth on November 25. We, however, do not expect it to produce any significant geomagnetic disturbance.
The Earth is currently inside the slow (around 410 km/s) solar wind flow with weak (around 2 nT) interplanetary magnetic field. We expect quiet geomagnetic conditions.

Most recent alerts

2009 Nov 22 1235 UTC
START OF ALL QUIET ALERT ....................... The SIDC - RWC Belgium [more]

2009 Oct 18 1006 UTC
The weak active region near central meridian in the Southern solar hemisphere [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]