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.

FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium) 2014 Oct 21

Catania sunspot group 88 (NOAA AR 2192) continues to grow and maintains the
beta-gamma-delta configuration of its photospheric magnetic field. It
produced four M-class flares in the past 24 hours, the strongest of them
being the M4.5 flare peaking at 16:37 UT. We expect flaring activity mostly
on the M-level in this group, with a good chance for an X-class flare. As
the Catania sunspot group 88 approaches the solar central meridian, a major
eruption in this active region may lead to a geoeffective CME and a proton
An active region at the north-east limb (no sunspots are still visible) produced several flares including the C6.3 flare peaking at 10:58 UT today. It may produce an isolated M-class flare as well.
A weak partial halo CME (angular width around 200 degrees) was first seen in the SOHO/LASCO C2 field of view at 19:12 UT on October 20. The CME was very weak and disappeared before reaching the LASCO C3 field of view, so we do not expect it to arrive at the Earth. The source of the CME is the eruption in the Catania sunspot group 88 (NOAA AR 2192) and in the region to the south-west of it, starting around 18:40 UT, accompanied with coronal dimmings and the M1.4 flare peaking at 19:02 UT.
The solar wind speed is currently high (around 640 km/s) and the interplanetary magnetic filed (IMF) magnitude is around 7 nT. Due to elevated values of the IMF magnitude and predominantly southward IMF direction, the K index reached 5 during one interval yesterday evening (according to Dourbes, IZMIRAN, and NOAA). Currently the north-south IMF component Bz is fluctuating around zero, so we expect quiet to unsettled geomagnetic conditions (K < 4) in the coming hours, possibly with isolated intervals of active conditions (K = 4).

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SWAP latest image

Latest USET H-alpha image
USET latest Halpha image

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Latest LYRA Curves

Latest Callisto Observations

Latest HUMAIN Callisto qkl

Daily estimated sunspot number

Most recent alerts

2014 Oct 21 1344 UTC
Catania sunspot group 88 (NOAA AR 2192) continues to grow and maintains [more]

2014 Sep 07 1337 UTC
The latest halo CME alert generated by the CACTus software package: 025|2014/09/06 [more]

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

Science Highlights

Oct 21, 2014: NOAA "Boom! Boom!" 2192

Oct 19, 2014: X1.1 flare on 19 October (NL-FR-EN)

Oct 08, 2014: An M7 surprise

Oct 01, 2014: Another farside blast

Sep 24, 2014: SBC or CIR?

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