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.


Flaring activity was limited to one single C1.4 flare, originating from
NOAA active region 2331 (Catania sunspot group 37), peaking at 20:57 UT.
Flaring at the minor C level is expected over the next few days. A filament
extending from N0E20 to N40E70 is currently crossing the solar disk. No
Earth directed CMEs were observed. 

 Earth is currently inside a slow solar wind (speed in the range 300-350
km/s). The magnitude of the interplanetary magnetic field (IMF) has
slightly increased to 7nT, with currently a negative Bz. The phi angle was
mainly positive, but turning to a negative orientation in the past few
The flow emanating from a recurrent equatorial coronal hole (currently
crossing the central meridian) is expected to arrive within two to three
days, which might result in an increased solar wind speed. Quiet to
unsettled (local K=0 to 3) geomagnetic conditions were observed and are
expected to remain so for the next 48 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

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]

Science Highlights

Apr 15, 2015: NOAA 2321: one, two or three groups?

Apr 09, 2015: Impressive filament eruption

Apr 02, 2015: Divergent

Mar 26, 2015: NOAA 2297 targets Earth

Mar 12, 2015: Marvellous M-flares

click here for all science highlights


Solar Eclipse, March 20, 2015

Good to know

ESWW12 - November 23-27, 2015

Six years of SOLAR/SOLSPEC mission on ISS