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.
Aug 18, 2015 DB: The Sunspot Number, the "longest ongoing scientific experiment" revisited


Solar activity has been very low without C-class flares in past 24h. The
situation is not expected to change significantly in the coming 48h.
Geomagnetic conditions have been at active levels overnight due to a mild
fast speed stream emanating form the southern extension of a high latitute
(northern) coronal hole. The situation is expected to be mostly at
unsettled levels in the next 48h.

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

2015 Oct 02 0048 UTC
A class M5.5 solar X-ray flare occurred on 2015/10/02 with peak time 00:13UT [more]

2015 Oct 01 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2015 Oct 01 0655 UTC
A series of CMEs were launched of which at least two were related to a [more]

2015 Jun 02 0746 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

Sep 30, 2015: Rise and Shine!...

Sep 23, 2015: Another head-to-tail collision

Sep 16, 2015: PROBA2 observes an annular solar eclipse

Sep 09, 2015: Polar faculae near the Sun's south pole

Sep 02, 2015: Showtime!

click here for all science highlights


Aug 18, 2015 DB: The Sunspot Number, the "longest ongoing scientific experiment" revisited

Aug 11, 2015 PV: The Perseids - don't miss it

Jul 01, 2015 FC : Switching to the new Sunspot Number

Click here for all the press releases

Good to know

ASGARD - Balloons for science : Project call

ESWW12 - Early bird registration until October 1