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.

STCE annual meeting - 10y celebration & roof top tour, June 9


Eight B-class flares and one C-class event were observed during the period,
with the C1.3 flare peaking at 10:20UT on 24 May. The source of all this
minor flaring activity was NOAA 2546 which remains the largest sunspot
group currently visible. A new small sunspot region emerged near disk
centre (Catania 80; N12E01), but remained quiet. No earth-directed coronal
mass ejections (CMEs) were observed. 

Mostly quiet conditions are expected, with a small chance on an isolated
C-class flare.

Solar wind speed mostly varied between 400 and 500 km/s. Bz varied between
-6 and +6 nT, with the Interplanetary Magnetic Field directed away from the
Sun. A small negative coronal hole (CH) on the southern hemisphere has
transited the central meridian. Quiet geomagnetic conditions were
Quiet to unsettled geomagnetic conditions are expected during the first 24
hours. Late on 25 or on 26 May, the wind stream associated with the small
negative southern CH may affect the geomagnetic environment. This may
result in active geomagnetic conditions.

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 16 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2016 May 16 1022 UTC
A partial halo CME with angular width of 158 degrees and the speed 558 [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 19, 2016: An early application...

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

click here for all science highlights


May 09, 2016 : Mercury 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

Annual Meeting - June 9 2016

Zemax OpticStudio software course - date to be set

ESWW13 - Call for Working Meetings and contributions to sessions