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.
Jul 01, 2015: Switching to the new Sunspot Number


Active Region (AR) 2378 produced two C-class flares and one M-class flare
over the past 24 hours. All other ARs have been relatively quiet. AR 2378
has produced the largest flare, a M1.5 class flare, peaking at 12:51 UT on
2015-Jul-03. There is little evidence of a CME associated with the flare.
There are some flows / small eruptions emerging from beyond the north-east
solar limb, and when the source region rotates into view we may see an
increase in activity. The proton numbers have continued to be low and have
not exceeded ~1 pfu at the Earth in the past 24 hours. Solar activity may
fluctuate in the coming days with AR 2378 appearing quite active.

The solar wind speed has been steadily rising over the past 24 hours, from
approx. 320 to 350 km / s. The density has also been slowly rising. The
total magnetic field has been slowly increasing from approx. 4 nT to 8 nT,
and the Bz component has been around 0 nT with some fluctuations in the
past 24 hours, and has dropped as low as -8 nT. A drop in the field and
small increases in velocity may cause a small increase in geomagnetic field
activity. Geomagnetic conditions ranged between Kp index 0-2 (NOAA) and
local K index (Dourbes) 0-3 over the past 24 hours, similar conditions are
expected to persist. There is one transient coronal hole currently located
in the South, which may enhance solar wind speeds at the Earth in a couple
of days.

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 Jul 02 0149 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2015 Jul 02 1027 UTC
A halo CME was detected by CACTUS at 14:36 on 01-Jul-2015 with a velocity [more]

2015 Jun 25 0906 UTC
A class M7.9 solar X-ray flare occurred on 2015/06/25 with peak time 08:16UT [more]

2015 Jun 02 0746 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

Science Highlights

Jun 24, 2015: First proton event of 2015

Jun 09, 2015: Filament eruption

May 27, 2015: Layer upon layer

May 20, 2015: Twisting beauties

May 06, 2015: A stethoscope for the Sun

click here for all science highlights


Jul 01, 2015: Switching to the new Sunspot Number

May 06, 2015: Extreme Space Weather: flares (NL-FR-EN)

Mar 20, 2015: Solar Eclipse

Click here for all the press releases

Good to know

Space Weather for Engineers - registration is open

Natural Hazards for Aviation Workshop - June 2 2015

ESWW12 - Abstract submission!

STCE annual meeting - 11 June 2015