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 very low. The new region (NOAA 2579) that started to
develop in the previous period continued to develop and grow and displayed
several minor B flares. The new region that turned into view in the South
East was numbered NOAA 2580 and is fairly simple while old region 2578
seems to redevelop some spots. As flux continues to emerge and the region
2579 continues to grow region 2579 is the most likely source for flaring. 
C flaring from region 2579 is quite possible but overall chances are judged
about equal that conditions will remain quiet.
Proton fluxes are at background levels and expected to remain so.
No Earth directed CMEs have been observed in coronagraph data.

Solar wind conditions were fairly nominal with solar wind speed in the 360
to 390 km/s range and total magnetic field initially stable around 5 nT.
During the morning the magnetic field increased gradually to around 10 nT
presently, with after 10:00UT also the Bz component becoming pronounced
negative (close to -10nT). Tomorrow an increase in solar wind speed may be
anticipated corresponding to a negative polarity coronal hole high speed

Geomagnetic conditions have been quiet to unsettled (both K Dourbes and
NOAA Kp 1-2) but activity can be expected to increase following the
increase in magnetic field strength and the prolonged period of negative
Bz. The arrival of a high speed stream tomorrow may further cause periods
of active geomagnetic conditions. 

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 Jul 25 0625 UTC
A shock-like feature was observed in the solar wind parameters on 23 July [more]

2016 Jul 24 0516 UTC
A class M5.5 solar X-ray flare occurred on 2016/07/23 with peak time 05:31UT [more]

2016 Jul 05 2210 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2016 May 16 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

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Jul 26, 2016: A spectacular flare

Jul 19, 2016: Sunspot neighbours

Jul 12, 2016: SC24 highlights page

Jul 06, 2016: Backside eruptions

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Comet tail seen by LASCO/C2

May 04, 2016: Mercury Transit (NL-FR-EN)

Mar 23, 2016: STCE 10 years - Happy Birthday (NL-FR-EN)

Jan 15, 2016: Space Technology & Calibration Laboratories

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