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.

Cosmic rays and space weather: research, services and future strategy - May 17


Solar activity is low, with no C-class flares reported during last 24
hours. There are currently seven numbered sunspot groups visible on the
solar disc, all having simple (alpha and beta) configuration of their
photospheric magnetic field. However, we can still expect occasional
C-class flares in the following 24 hours (probability is about 35 percent).
The CME associated with the C3.5 flare observed on May 02, had angular
width of about 90 degrees and was directed north-east from the Sun-Earth
line, and it will therefore not arrive to the Earth.
No Earth directed CMEs were observed in the last 24 hours. 
The Earth is still inside the fast solar wind with the speed of about 570
km/s. The interplanetary magnetic field magnitude is rather stable during
last 10 hours and it amounts 5 nT. 
Due to the negative value of the Bz component of the interplanetary
magnetic field (down to -7 nT) and the fast solar wind speed (about 550
km/s), geomagnetic storm conditions (NOAA reported planetary K index to be
5 and local station at Dourbes reported K=4) were reported before the
midnight on May 02. 
Small equatorial coronal hole has reached central meridian this morning.
The associated fast solar wind can be expected at the Earth on May 06.
Currently, the Bz component of the interplanetary magnetic field amounts
about 1 nT and the geomagnetic conditions are quiet to unsettled. However,
if the value of the Bz component decreases again, the intervals of the
active and storm conditions are possible in the coming hours. 

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 02 0953 UTC
The arrival of the fast speed stream induced the geomagnetic storm conditions [more]

2016 Apr 24 1344 UTC
A halo or partial-halo CME was detected with the following characteristics: [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 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

Apr 05, 2016: Spectacular prominence eruption

click here for all science highlights


Mar 22, 2016 : STCE 10 YEARS - Happy Birthday!

Jan 15, 2016 : Space Technology & Calibration Laboratories - at your service

Dec 01, 2015 : Space Weather - Belgian wins an award

Click here for all the press releases

Good to know

Mercury Transit - May 9 2016, info to follow

Cosmic rays and space weather: research, services and future strategy - May 17 2016

Annual Meeting - June 9 2016

Zemax OpticStudio software course - date to be set

ESWW13 - Call for Working Meetings and contributions to sessions