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


Solar activity was relatively quiet, with only NOAA Active Region (AR) 2373
producing two C class flares in the last 24 hours, A C2.3 flare peaking at
14:55 UT and a C2.4 flare peaking at 18:07 UT. Other recurrent active
regions are rotating into view now and may increase solar activity in the
coming days. Proton levels are still declining and are now
below 1 pfu.
The solar wind speed has remained roughly constant over the past 24 hours,
and has varied between 360 km/s to 440 km/s. The total magnetic field has
been slowly decreasing from 6 nT to 3 nT, and the Bz component has
fluctuated from positive to negative between +6 and -5 nT, but remained
around 0 nT for the past several hours. Geomagnetic conditions ranged
between Kp index 1-2 (NOAA) and local K index 1-3 over the past 24 hours.
There were no significant CMEs over the past 24 hours. A small CME emerged
from the East solar limb, possibly from AR 2375. The CME had a recorded
velocity of 625 km/s but is not expected to be geoeffective.

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 Jun 27 0738 UTC
The CME from June 25 arrived at 02:20 UT, with speeds reaching 900 km/s [more]

2015 Jun 25 1654 UTC
A halo or partial-halo CME was detected with the following characteristics: [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