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


Only B-class flares were observed during the last 24 hours. The strongest
was a B7.2 flare peaking at 06:56UT (29 May) and produced by NOAA 2548. A
long-duration B3.4 event (peaking at 03:21UT) had the spotless active
region near the northeast limb as its source. The associated coronal mass
ejection had no earth-directed component. Small region NOAA 2549 was stable
and produced a B2 flare. No earth-directed coronal mass ejections (CMEs)
were observed.

There remains a chance on an isolated C-class flare.

Earth remained under the weakening influence of a coronal hole (CH) high
speed stream (HSS). Solar wind speed decreased from an initial range
between 450 and 550 km/s to values between 400 and 450 km/s at the end of
the observing period. Bz varied mostly between -6 and +6 nT. The
interplanetary magnetic field was directed towards the Sun. Quiet to
unsettled geomagnetic conditions were observed, with Dourbes recording an
active episode during the 21UT-interval.
Quiet to active geomagnetic conditions are expected with the arrival of the
HSS from the northern CH later today or tomorrow. There's a small chance on
an isolated minor storming episode.

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