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.
Nov 21, 2015 PV: Can the sun cause radar blackouts disrupting air traffic? - ESWW12


The Sun did not produce any C flares in the past 24 hours. Quiet conditions
(no C flares) are expected within the next 24 hours.
The magnitude of the Interplanetary Magnetic Field gradually rose from 4 to
9 nT. Around 4h UT on November 27, the speed of the solar wind increased
rapidly from 260 to 330 km/s. This increase was accompanied by a sector
boundary crossing (first away from the Sun, after 4h UT towards the Sun).
Over the past 24 hours, geomagnetic conditions have been quiet to unsettled
(K Dourbes between 0 and 3; NOAA Kp between 0 and 3). Quiet to unsettled (K
Dourbes < 4) conditions are expected on 27, 28 and 29.

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 Nov 18 2112 UTC
At 19:23 UT a shock was observed in the solar wind with magnetic field [more]

2015 Nov 04 1949 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

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

Science Highlights

Nov 17, 2015: A filament kisses the Sun goodbye!

Nov 11, 2015: Strong radio event on 04 November

Nov 03, 2015: Proton event!

Oct 27, 2015: Connected

Oct 14, 2015: A swiftly blowing wind

click here for all science highlights


Nov 21, 2015 PV: Can the sun cause radar blackouts disrupting air traffic? - ESWW12

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

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

Click here for all the press releases

Good to know

ASGARD - Balloons for science : Project call

ESWW12 - Early bird registration until October 1