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 Eclipse, March 20, 2015


Four sunspot groups are reported by Catania today. The strongest flare
during the last 24 hours was the C4.7 flare peaking at 01:52 UT in the NOAA
AR 2303 that just passed behind the north-west solar limb (and therefore
does not have a Catania number anymore). We expect flaring activity on the
low C-level in the next 48 hours. A partial halo CME was first seen in the
SOHO/LASCO C2 field of view at 18:24 UT on March 29. It had the angular
width of around 190 degrees and the plane-of-the-sky projected speed of
around 700 km/s. SDO/AIA data indicate that this was a far-side event. It
will therefore not arrive at the Earth and have no geomagnetic
The Earth is currently inside a slow (around 340 km/s) solar wind flow with
average (around 6 nT) interplanetary magnetic field magnitude. The
geomagnetic conditions are quiet and are expected to remain so until the
arrival of a fast flow from a low-latitude extension of the southern polar
coronal hole later today or early tomorrow. Geomagnetic disturbance up to
the minor storm level is expected. 

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 Mar 30 1044 UTC
A partial halo CME was first seen in the SOHO/LASCO C2 field of view at [more]

2015 Mar 24 1949 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

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

Science Highlights

Mar 26, 2015: NOAA 2297 targets Earth

Mar 12, 2015: Marvellous M-flares

Mar 11, 2015: Press Release Extreme Space Weather: NOAA 2297 produces strong X2 flare (NL-FR-EN)

Mar 05, 2015: A gorgeous filament eruption

Feb 25, 2015: An icy visitor from outer space

click here for all the news items

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