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

Presto 2022-05-25

A partial CME was reported by the CACTus software, time of occurrence May 24 22:36UTC with projected plane-of-the-sky speed of about 408 km/s. The CME was first time observed in the SOHO/LASCO C2 filed of view at 23:12 UTC and in the STEREO A/COR2 field of view at 23:09 UTC. The CME is associated with a C5.2-class flare from newly rotated NOAA AR 3023, peak time May 24 22:17UTC and two filament eruptions around that region. Considering the position of the STEREO A and the orientation of the CME we can conclude that the bulk of the CME will not be Earth directed but a shock arrival cannot be excluded.

CACTus Halo 2022-05-25

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2022-05-24T22:36:09.107 | 3.0 | 91 | 156 | 408 | 131 | 220 | 762 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
    (probability >=50%)
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN:

Solar Activity

URSIgram 2022-05-25

There are seven active regions on the visible solar disc. NOAA ARs 3010 and 3011 having rotated off and NOAA AR 3023 and 3024 having rotated on visible disc. Over the past 24 hours, solar flaring activity has been low, with the flare of the largest X-ray output the C5.2-class flare, peak time May 24 22:17UTC, from NOAA AR 3023. For the next 24 hours, C-class flares can be expected with M-class flares remain possible. The C5.2-class flare was associated with two filament eruptions observed in AIA 304 data on the Eastern limb and a partial-halo CME (reported by the CACTus software) with time of occurrence May 24 22:36UTC with projected plane-of-the-sky speed of about 408 km/s. The CME was first time observed in the SOHO/LASCO C2 at 23:12 UTC and in the STEREO A/COR2 at 23:09 UTC. Another CME can be observed in STEREO A/COR2 on May 25 04:09UTC and SOHO/LASCO C2 at 04:00 UTC. Around that time some activity can be seen around former NOAA AR 3016, but it is not evident that that was the source region. For both CMEs it is currently believed that the bulk will not be Earth directed but a shock arrival cannot be excluded. The greater than 10 MeV proton flux was at nominal levels and is expected to remain so in the next 24 hours. The greater than 2MeV electron flux was just under the 1000 pfu threshold over the past 24 hours. It can be expected to be about threshold the next 24 hours. The 24h electron fluence was at normal to moderate levels and is expected to be at normal to moderate levels in the next 24 hours.

Solar Wind

URSIgram 2022-05-25

Over the past 24 hours, the magnetic field values fluctuated between 2 and 9nT, while Bz had values between -6 and +6 nT. The solar wind speed fluctuated around 430 km/s. The interplanetary magnetic field phi angle was predominately on the positive sector (away from the Sun). Effects from its high speed stream of what looks like an elongated coronal hole that first crossed central meridian on May 23 can be expected to start arriving over the next 24 hours, lasting for a number of days. Over the past 24 hours, geomagnetic conditions were quiet, with one unsettled period May 25 07:00-08:00UTC (K Dourbes=3). Over the next 24 hours, quiet to unsettled conditions can be expected.





The EUI telescope causes a revolution in solar physics

On March 26, 2022, the Solar Orbiter satellite came closer to the Sun than ever before. A particularly exciting moment. The images of this closest approach -the perihelion-, taken by the Extreme Ultraviolet Imager (EUI) on board are will revolutionize solar physics!

A Patchwork Image of the Sun

On 7 March, 2022, the high-resolution telescope of the Extreme Ultraviolet Imager (EUI) onboard the Solar Orbiter spacecraft made a mosaic image of the solar disk. Over a period of more than 4 hours, the satellite aimed at different positions each time capturing a small square of the Sun at very high resolution. These images were then stitched together like a patchwork. The result was an extremely detailed image of the entire Sun.

Unique images of a solar cloud

On February 15, 2022, an immense cloud escaped from the sun. The space telescope EUI onboard the Solar Orbiter satellite could capture the solar cloud while it was hurled into space.


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.

Read more

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...

Read more

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.

Read more

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.

Read more


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

Read more


Supporting Research

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

Read more