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)


Solar activity remains low, with no C-class flares reported during last 24
hours. The strongest reported flare was B7.5 flare, peaking at 00:01 UT, on
May 04. The flare originated from the active region situated at that moment
just behind the east solar limb.
There are currently four numbered sunspot groups visible on the solar disc,
all having simple (alpha and beta) configuration of their photospheric
magnetic field. The occasional C-class flares are still possible in the
following 24 hours (probability is about 30 percent). 
No Earth directed CMEs were observed in the last 24 hours.

The solar wind speed has decreased and currently amounts about 450 km/s.
The interplanetary magnetic field magnitude remained stable having the
value of 3 nT. 
The fast solar wind, associated with the small equatorial coronal hole
which reached central meridian yesterday morning, might be expected at the
Earth on May 06. The geomagnetic conditions are 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