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Observations

Space Based Imaging

More data: SWAP, EUI

Ground Based Imaging

More: H-α, WL, Ca-IIK, Drawings

Ground Based Radio

More: ARCAS+HSRS, CALLISTO

Space Based Timelines

More data: LYRA, TSI

WDC Sunspot Index

More data: SILSO

Space Weather Services

Detections

Solar Map

Latest Alerts

None

No alerts since: 2026-04-08

Forecasts

  • Flare: C-class flares
    (≥50%)
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN:

Solar Activity

URSIgram 2026-04-13

A total of 4 numbered sunspot groups were identified on the disk over the past 24 hours, with simple alpha or beta magnetic field configuration. There was only one C-class flare in the last 24 hours. This was a C1.2 flare from SIDC Sunspot Group 842 (NOAA AR 4414), currently located at N15E12 with a Beta magnetic configuration. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares likely. No Earth-directed CMEs were observed int he last 24 hours. There are two mid-latitude positive polarity coronal holes (SIDC Coronal Holes 154 and 158) in the western hemisphere, and one (159) crossing the central meridian, also with positive polarity. The greater than 10 MeV proton flux, as measured by GOES-18, was below the 10pfu threshold level over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux, as measured by GOES-19, remained below the 1000 pfu alert threshold over the past 24 hours. The greater than 2 MeV electron flux, as measured by GOES-18, briefly exceeded the 1000 pfu alert threshold between 17:00 UTC and 23:00 UTC on April 12 and remained below the threshold for the rest of the period. The flux is expected to remain mostly below the alert threshold over the next 24 hours. The 24-hour electron fluence was at normal to moderate levels over the past 24 hours and is expected to remain at these levels over the next 24 hours.

Solar Wind

URSIgram 2026-04-13

Geomagnetic conditions have been quiet to unsettled (Kp up to 2 and K_BEL up to 3). Similar conditions can be expected for the next 24 hours, with possible active to minor storm periods if the fast solar wind from SIDC Coronal Holes 154 and 158 arrives to the Earth. The solar wind speed is low, around 420 km/s with interplanetary magnetic field magnitude of 6 nT, with positive polarity (away from the Sun). In the next 24 hours, there is a possible arrival of a mild fast solar wind stream from the small positive polarity coronal holes (SIDC Coronal Holes 154 and 158).

Research

News

ComboCMEX1

A wimp and a bully

Two earth-directed coronal mass ejections surprised space weather forecasters with their arrival time and geomagnetic impact. The first one passed almost unnoticeable, the second one eventually resulted in a strong geomagnetic storm.
X1_AIA131

X-class flare!

NOAA 4405 produced an X-class flare early on 30 March. The associated CME arrived around noon on 1 April. There's no chance on aurora over Belgium tonight. ***(UPDATED 2)***
Hinode

We're not done yet!

Though the solar cycle maximum is already 1.5 years behind us, we may still expect a number of very strong solar flares over the next 2 years.
 

Activities

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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Modeling

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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