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.


The solar activity has been quiet over the past 24 hours. Catania sunspot
group 86 & 88 (NOAA active region 2713 and 2715) produced few B-class
flares. Flaring conditions are expected to remain quiet.

No Earth directed Coronal Mass Ejection has been observed. The greater than
10 MeV solar protons flux remained at nominal levels over the past 24 hours
and is expected to remain so.

Solar wind ambient environment was at the background and slow solar wind
speed regime until today Jun 23 around 00:00 UT. As it was expected, the
solar wind conditions have enhanced due to the arrival of the solar wind
associated to the north pole coronal hole that has passed the central
meridian on the June 20. The solar wind speed increased from about 320 to
near 450 km/s. The interplanetary magnetic field strength has somewhat
slowly increased to reach 15.7 nT and the southward component reached -15.0
nT on Jun 23 at 11:46 UT. The solar wind is expected to increase further
and the global enhanced solar wind conditions are expected to persist
within the next 24-hour period and until while under the influence of the
HSS associated with the coronal hole.

The geomagnetic conditions have been quiet until Jun 23 at 03:00 am. Then
it became active due to the arrival of the fast solar wind with Kp-index =
4 (NOAA) at 12:00 UT and K-index=4 (Dourbes) at 11:00 UT on Jun 18. Due to
the ongoing enhancement of the solar wind, unsettled to active geomagnetic
conditions are expected for the next forecasting period. Isolated minor
geomagnetic storms cannot be excluded, especially if Bz component remains
negative for long period of time.

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 Jun 21 1241 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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