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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


No alerts since: 2024-07-17


  • Flare: M-class flares
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN: 184

Solar Activity

URSIgram 2024-07-21

Solar flaring activity was moderate with three M1 flares detected during the past 24 hours. NOAA Active Region (AR) 3744 (magnetic configuration Beta, Catania sunspot group no 96) produced the first two flares, an M1.5 at 20 Jul 18:49 UTC and an M1.4 at 21 Jul 03:55 UTC. NOAA AR 3751 (magnetic configuration Beta-Gamma-Delta, Catania sunspot group no 12) produced the third, an M1.5 at 21 Jul 08:34 UTC. Further M-class flaring activity is likely, mostly from the AR mentioned above, and there is a small chance of an X-class flare in the next 24 hours. No Earth-directed Coronal Mass Ejections (CME) were observed in the last 24 hours. The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is likely to remain so. Nevertheless, there is a small chance of a proton event associated with the activity of NOAA active region 3751. The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was at nominal levels during the last 24 hours and is expected to remain at these levels during the next 24 hours. The 24h electron fluence was at very low levels during the past 24 hours and is expected to remain at these levels for the following 24 hours.

Solar Wind

URSIgram 2024-07-21

During the last 24 hours geomagnetic conditions were globally quiet (NOAA Kp 1 to 2+), while locally they had a brief period of unsettled conditions (K BEL 3 at 20 Jul 15:00-21:00 UTC). They are expected to remain quiet both globally and locally in the next 24 hours. Solar Wind (SW) conditions remained typical of the slow SW regime during the past 24 hours. The SW speed varied between 310 and 380 km/s, while the total interplanetary magnetic field (Bt) ranged between 2 and 10 nT during the past 24 hours. The North-South magnetic component (Bz) fluctuated between -4 and 6 nT, while the interplanetary magnetic field phi angle was directed predominately towards the Sun in the past 24 hours. The SW conditions are expected to follow the same pattern for the next 24 hours.




X1 flare in NOAA 3738

NOAA 3738 produced an X1.2 flare on 14 July 2024. ***UPDATE 2***

An X12 flare on the Sun's farside

On 20 May, instruments on board Solar Orbiter observed what was most likely the strongest solar flare so far during SC25.

Impressive eruption

An impressive eruption took place over the Sun's southwest limb on 24 June.


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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