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.
May 09, 2016 : Mercurius transit (NL-FR-EN)


The C1.7 flare which peaked at 22:48 UT on May 04, was the stronger flare,
out of the two C-class flares reported during last 24 hours. The flare
originated from the Catania sunspot group 73 (NOAA AR 2542), at that moment
situated close to the East solar limb. 
One, out of five sunspot groups visible on the solar disc, has alpha
configuration of its photospheric magnetic field, and four have beta
configuration. We expect C-class flares in the next 24 hours.
The only significant CME observed during last 24 hours was associated with
the C1.3 flare from the Catania sunspot group 63 (NOAA AR 2535), and had
angular width of about 90 degrees. This CME will not arrive at the Earth.

The solar wind speed is currently 380 km/s, and the interplanetary magnetic
field magnitude is about 5 nT. The fast solar wind, associated with the
small equatorial coronal hole which reached central meridian in the morning
of May 03, can be expected at the Earth on May 06. The arrival of the fast
flow might induce active to geomagnetic storm conditions.
The geomagnetic conditions are presently quiet and we expect them to remain
so in the coming hours.

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

2016 May 02 0953 UTC
The arrival of the fast speed stream induced the geomagnetic storm conditions [more]

2016 Apr 24 1344 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2016 Apr 18 0110 UTC
A class M6.7 solar X-ray flare occurred on 2016/04/18 with peak time 00:29UT [more]

2016 Apr 06 1046 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

May 05, 2016: One year with no X-class flares

Apr 26, 2016: NOAA 2529 remains active

Apr 19, 2016: Dynamic NOAA 2529

Apr 12, 2016: Comin' around the bend

Apr 05, 2016: Spectacular prominence eruption

click here for all science highlights


May 09, 2016 : Mercurius transit (NL-FR-EN)

Mar 22, 2016 : STCE 10 YEARS - Happy Birthday!

Jan 15, 2016 : Space Technology & Calibration Laboratories - at your service

Click here for all the press releases

Good to know

Cosmic rays and space weather: research, services and future strategy - May 17 2016

Annual Meeting - June 9 2016

Zemax OpticStudio software course - date to be set

ESWW13 - Call for Working Meetings and contributions to sessions