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 flaring activity was low with just two C flares occurring over the
period. The largest was a long duration event from over the western limb,
peaking at 18:49UT at C1.9 magnitude. It was associated with an eruption
and CME, which appears to be not directed to Earth. Another C1.0 flare from
Catania group 37 (NOAA region 2331) peaked just before the end of the
period at 11:49UT.
Flaring at C level is expected over the next days.
An asymmetric full halo CME was also visible in SoHO/LASCO coronagraph data
from 14:48UT onwards in the C2 field of view.
No related on disc activity could be associated, and the event is believed
to be backsided and hence not geoeffective.
Solar wind was at nominal levels with speeds in the 290-330 km/s range and
total magnetic field in the 2.1-4.6 nT range. Bz was variable though
initially mostly positive. Phi angle was stable in the outward sector.
Geomagnetic conditions were quiet to unsettled (NOAA Kp 0-1, local K
Dourbes 0-3).
Nominal solar wind conditions with associated quiet to unsettled
geomagnetic conditions are expected to continue over the next days.
Some possible sector boundary crossings could slightly enhance solar wind

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

2015 Apr 26 0744 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2015 Apr 26 0709 UTC
An asymmetric full halo CME is visible in SoHO/LASCO coronagraph data from [more]

2014 Aug 08 1211 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

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