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 Apr 19
13:30:30

Ten sunspot groups were reported by NOAA today. Two of them (NOAA ARs 2036
and 2037) have beta-gamma configuration of the photospheric magnetic field
(although the NOAA AR 2037 is strongly decaying), and NOAA AR 2035 has
beta-gamma-delta. Since yesterday's M-flare, only weak C-class flares were
detected, the strongest one being the C2.1 flare peaking at 03:26 UT today
in a tiny sunspot group at S19E66 that seems to start emerging. A number of
C-class flares was also observed in the sunspot group that just appeared
from behind the south-east solar limb (returning NOAA AR 2021). We expect
further flaring activity on the C-level, with a good chance for another
M-class event. The proton event produced by the halo CME of April 18 is
still going on.
The solar wind speed is currently around 500 km/s and the interplanetary magnetic field magnitude is around 7-8 nT. The north-south IMF component Bz fluctuates between positive and negative values, so the geomagnetic situation remains mostly quiet, with only occasional intervals of K = 4 reported by Dourbes, IZMIRAN and NOAA. The geomagnetic conditions will probably be quiet to unsettled until April 21, when we expect the arrival of the ICME (or the shock driven by it) corresponding to the halo CME observed on April 18. A geomagnetic storm (with K index probably up to 6) may result.

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

Most recent alerts

2014 Apr 19 1330 UTC
Ten sunspot groups were reported by NOAA today. Two of them (NOAA ARs 2036 [more]

2014 Apr 05 1842 UTC
The latest halo CME alert generated by the CACTus software package refers [more]

2013 Sep 25 1242 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]


Latest News

Apr 16, 2014: Saturday Morning Fever...

Apr 09, 2014: Small groups, big flares

Apr 02, 2014: Homologous flares

Mar 26, 2014: Waiting for the big one

Mar 20, 2014: Revolt of the filaments

click here for all the news items



Good to know

7th Solar Information Processing Workshop - Registration and abstract submission is OPEN, August 17-22, 2014

ESWW11, 17-21 November, 2014 - Abstract submission is OPEN

STCE Workshop - Long Term Solar Changes and their effect on Earth, May 19, 2014

STCE Workshop - Physical processes in solar-terrestrial plasmas, May 22 - 23, 2014

STCE Workshop - Modelling antennas & calibration of radio instruments, June 6, 2014

STCE 2014 annual meeting, June 12, 2014