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.


Active Region (AR) 2671 (McIntosh class: Fkc; Mag.type: Beta-Gamma) and AR
2672 (McIntosh class: Dao; Mag.type: Beta) produced three C-class flares
during the past 24 hours. The largest flare was C3.0 flare peaking at 17:57
UT yesterday. No Earth directed Coronal Mass Ejections (CMEs) have been
detected. The greater than 10MeV proton flux remained at background levels
over the past 24 hours. There are no potentially geoeffective coronal holes
on the Sun. More C-class flares are expected over the next 24 hours with
some probability of M-class flares.
Solar wind parameters are still under influences of a coronal hole high
speed stream (CH HSS). During the past 24 hours solar wind speeds remained
stable around 600 km/s with  two brief increases till around 670 km/s
(22:30 UT yesterday and 07 UT today). Total filed strength increased till
9nT at 02 UT today, simultaneously the Bz component reached a maximum
southward deflection of -9 nT. The interplanetary Kp index increased from 3
till 6 reaching moderate storm level (00-03 UT), minor storm level (Kp=5
during 03-06UT). Later Kp index returned to quiet conditions again. The
local station at Dourbes reported values of up to K=4. Next two days active
geomagnetic conditions can be expected, isolated episode of minor
geomagnetic storm is not excluded. 

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

2017 Aug 22 0830 UTC
Due to the increased values of solar wind (from 570 km/s and up to 670 [more]

2017 Jul 30 1211 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2017 Jul 23 1044 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2017 Apr 03 1504 UTC
A class M5.8 solar X-ray flare occurred on 2017/04/03 with peak time 14:29UT [more]

Science Highlights

Aug 22, 2017: PROBA2 eclipse observations - first images online

Aug 02, 2017: Night of the (shooting) Stars 2017 ***CANCELLED***

Jul 27, 2017: NOAA 2665's fireworks continues!

Jul 19, 2017: The Bastille Day 2017 event

Jul 10, 2017: A Sunday morning solar observing session

click here for all science highlights


Aug 11, 2017: Eclipse fever

Jun 02, 2017: Extreme Ultraviolet Imager (EUI) ready for launch!

May 28, 2017: A coronal mass ejection as the source of a strong geomagnetic storm (NL-FR-EN)

Click here for all the press releases

Good to know

PROBA2: Eighth Call for Guest Investigators

A Design 4 a Ticket

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