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.


Solar activity was at very low levels during the period. Sunspot region
NOAA 2668 is decaying and barely visible. No earth-directed coronal mass
ejections (CMEs) were observed in available coronagraphic imagery. The
greater than 10 MeV proton flux reached a maximum of about 2 pfu (i.e.
below the 10 pfu event threshold) around 21-22UT, and is now gradually

Quiet flaring conditions are expected.

The earth environment remained under the influence of the high speed stream
(HSS) from a positive polarity coronal hole (CH). Wind speeds gradually
increased from an initial value near 570 km/s to about 660 km/s by 03UT,
then decreased to 590 km/s by the end of the period (DSCOVR). Bz oscillated
between -5 and +7 nT. The interplanetary magnetic field was mostly directed
away from the Sun, with a "towards" sector during the 14-22UT interval. 
The geomagnetic field was at quiet to unsettled levels, with an active
episode during the 06-09UT interval recorded by both Dourbes and in Kp.
Mostly quiet to unsettled geomagnetic conditions are expected, with a
chance on another active episode under the persistent influence of the CH

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

2017 Jul 23 1206 UTC
SoHO/LASCO C2 images show a full halo CME from 4:36UT onwards. STEREO [more]

2017 Jul 19 1216 UTC
START OF ALL QUIET ALERT ........................ The SIDC - RWC Belgium [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

Good to know

PROBA2: Eighth Call for Guest Investigators

A Design 4 a Ticket

Breaking news