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. The magnetic complexity of Catania sunspot group 86 (NOAA active
region 2715) has slightly increased (from beta to beta-delta Hale class),
therefor it has a high chance of producing C-class flare with potentially,
but less likely, a M-class flare. 

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.

The Earth remained under the influence of the solar wind associated with
the north pole coronal hole that has passed the central meridian on the
June 20. The wind speed values reached 510 km/s on June 23 around 23:30 UT,
and is currently around 490 km/s. The interplanetary magnetic field has
slowly converged toward its nominal condition. Currently the total magnetic
field strength below 5 nT and the southward component fluctuating between
-3 and +2 nT. Solar wind conditions are expected to return to the slow
regime within the next two days. 

The geomagnetic conditions have been unsettled to active over the past 24
hours due to the ongoing enhancement of the solar wind with K-index
(Dourbes) and Kp-index (NOAA) ranging between 2 and 4. Unsettled
geomagnetic conditions are expected with possible short active periods for
the next day.

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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