Space Based Imaging

More data: SWAP, EUI

Ground Based Imaging

More: H-α, WL, Ca-IIK, Drawings

Ground Based Radio


Space Based Timelines

More data: LYRA, TSI

WDC Sunspot Index

More data: SILSO

Space Weather Services


Solar Map

Latest Alerts

CACTus Halo 2022-12-01

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2022-12-01T00:00:07.459 | 3.0 | 38 | 154 | 520 | 165 | 235 | 923 t0: onset time, earliest indication of liftoff dt0: duration of liftoff (hours) pa: principal angle, counterclockwise from North (degrees) da: angular width of the CME (degrees), v: median velocity (km/s) dv: variation (1 sigma) of velocity over the width of the CME mindv: lowest velocity detected within the CME maxdv: highest velocity detected within the CME


  • Flare: C-class flares
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN:

Solar Activity

URSIgram 2022-12-04

The solar flaring activity was at moderate levels. The largest flare was an impulsive M1.2 flare, peaking at 17:45 UT, associated with newly numbered region NOAA AR 3157 near the northeast limb. This event was also associated with a Type II radio emission. New region, NOAA AR 3158, emerged in the northern hemisphere but remains simple and has been inactive. Catania sunspot groups 8 and 11 (NOAA ARs 3153 and 3156) produced low level C-class flares. Catania sunspot group 9 (NOAA ARs 3155) showed some flux emergence. Catania sunspot group 7 (NOAA AR 3154) decayed and was inactive. Solar flaring activity is expected to be at low levels, with C-class flares likely and a chance for M-class flares. No Earth directed CMEs were detected in the available coronagraph imagery. In the past 24 hours the greater than 10 MeV proton flux was below the minor-storm warning threshold and is expected to remain so. The greater than 2 MeV electron flux exceeded the 1000 pfu threshold during the last 24 hours. The electron flux is expected to continue to exceed this threshold over the next day. The 24h electron fluence was at moderate to high levels. The 24h electron fluence is expected to be at moderate to high levels in the next 24 hours. On December 04, a large trans-equatorial negative polarity coronal hole began to transit the central meridian.

Solar Wind

URSIgram 2022-12-04

The solar wind conditions reflected the waning influence of the high-speed stream. The solar wind speed ranged between 570 km/s and 490 km/s. The interplanetary magnetic field magnitude ranged between 1 and 7 nT. The magnetic field orientation was predominantly in the positive sector (field directed away from the Sun). The solar wind speed is expected to continue to gradually decrease over the next 24 hours. Geomagnetic conditions were quiet to unsettled (NOAA KP 2-3 and Local K Dourbes 2-3). Geomagnetic conditions are expected to be at quiet to unsettled levels over the next day.





Solar snake spotted slithering across Sun’s surface

Solar Orbiter has spotted a ‘tube’ of cooler atmospheric gases snaking its way through the Sun’s magnetic field. The observation provides an intriguing new addition to the zoo of features revealed by the ESA-led Solar Orbiter mission, especially since the snake was a precursor to a much larger eruption.

Close-up of the Sun

The ESA-led Solar Orbiter mission has experienced its second close encounter with the Sun.  It is delivering more stunning data, and at higher resolution than ever before! 

And so they meet again…

Solar Orbiter speeds towards its next rendezvous with the Sun on the evening of October 12.


Ground Observations

The SIDC monitors the level of solar activity from the photosphere to the corona with ground based instruments located in Uccle and Humain.

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Space Instruments

To avoid the disturbing or blocking effect of the Earth atmosphere, EUV observations of the solar corona need to be made from space...

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Space Weather & Climate

We monitor and forecast solar variability to provide information services  to society and industry about the influence of space weather and climate.

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Data Processing & Distribution

Data processing is necessary to extract relevant information for research studies, whereas data distribution and visualization are part of ROB open data policy.

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Modelling of Solar phenomena allows scientists to test theories and to predict Space Weather phenomena and their impact on Earth.

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Supporting Research

The SIDC shares and expands its expertise through interaction with both upcoming and experienced researchers.

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