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.


A C1.2 flare peaking at 00:02UT was recorded off the SouthWest Solar limb,
apparently still related to NOAA region 2665, which is by now already well
past the limb.
With no spotted regions on disk the probability for C flares is very low
over the next days.
SDO/AIA 304 shows a filament eruption in the Southern hemisphere from
03:13UT onwards. There are no significant related signatures of this event
in coronagraph data, and it is thus expected not to influence Earth.
Proton flux levels are at background values and are expected to remain so.

Solar wind was nominal for most of the period with solar wind speed
declining to values around 380 km/s and total magnetic field mostly under
4nT. The magnetic field phi angle switched back and forth three times as
some expected sector boundary crossings occurred. The phi angle now
indicates outward magnetic field orientation. Over the past hours,
temperature as well as total magnetic field have been rising (to around 8nT
presently) which could mark the first signs of the influence of the
extension of the positive polarity northern polar coronal hole.
Under the influence of the extension of the northern polar coronal hole
solar wind speed may increase over the next few days.
Geomagnetic conditions were quiet (local K Dourbes and NOAA Kp 1-2) and are
expected to become quiet to unsettled with possibly some isolated active
periods depending on the strength of the expected coronal hole influence.

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 Jul 19 1216 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [more]

2017 Jul 18 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2017 Jul 16 1627 UTC
As expected, the arrival of 14th July full halo coronal mass ejection (CME) [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

Jul 19, 2017: The Bastille Day 2017 event

Jul 10, 2017: A Sunday morning solar observing session

Jul 04, 2017: An eruptive surprize

Jun 21, 2017: A day on the Sun

Apr 26, 2017: Works in progress!...

click here for all science highlights


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)

Oct 26, 2016: High-speed solar wind causes major geomagnetic storm (NL-FR-EN)

Click here for all the press releases

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