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 activity was at low levels. The largest flare B3.7 originated at NOAA
AR 2711 (McIntosh: Cso; Mag.Type: Beta) peaked yesterday (25-May-2018) at
20:09 UT. NOAA AR 2710 decayed to Halpha plage. No earth-directed coronal
mass ejections (CMEs) were observed in available coronagraphic imagery. The
greater than 10 MeV proton flux was at nominal levels. Solar activity is
expected to be at low levels with some probability for C class flares.
Solar wind parameters returned to the background level. The solar wind
speed gradually decreased from 375 km/s till about 320 km/s. The total
magnetic field was below 5 nT. The Bz component fluctuated around 0nT
between -1 nT and +3 nT. Geomagnetic conditions ranged between Kp index 0-1
(NOAA) and local K index 1-3 (Dourbes) over the past 24 hours. Geomagnetic
conditions are expected to be quiet today and tomorrow. Later, from
28-May-2017 most likely unsettled geomagnetic conditions can be expected
due to the weak influence from a positive polarity low lattitude extension
of the northern coronal hole. 

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

2018 May 15 1356 UTC
END OF ALL QUIET ALERT ...................... The SIDC [more]

2018 May 06 0934 UTC
Geomagnetic activity has reached moderate storm levels with an episode [more]

2018 May 04 1644 UTC
A halo or partial-halo CME was detected with the following characteristics: [more]

2017 Sep 10 1650 UTC
A class X8.9 solar X-ray flare occurred on 2017/09/10 with peak time 16:06UT [more]

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