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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: 2025-07-08

Forecasts

  • Flare: M-class flares
    (≥50%)
  • Protons: Quiet
  • Geomagnetic: Active conditions
    (A>=20 or K=4)
  • All quiet: False
  • Provisional SSN: 126

Solar Activity

URSIgram 2025-07-12

Solar flaring activity was moderate over the past 24 hours, with 2 M-class flare identified. The largest flare was a M2.37 flare peaking on July 12 at 08:30 UTC, which was produced by SIDC Sunspot Group 553 (NOAA Active Region 4140). A total of 6 numbered sunspot groups were identified on the disk over the past 24 hours. SIDC Sunspot Group 522 (NOAA Active Region 4136) is the largest region on disk and has a Beta-Gamma-Delta magnetic configuration SIDC. Sunspot Group 553 (NOAA Active Region 4140) has rotated on disk and produced most of the flaring activity in the last 24 hours. Solar flaring activity is expected to be moderate over the next 24 hours, with C-class flares expected and M-class flares likely. No Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images. Returning SIDC Coronal Hole 104 (low to mid latitude coronal hole with a positive polarity) started to cross the central meridian on July 08 and is continuing to cross the central meridian. Over the past 24 hours, the greater than 10 MeV GOES proton flux was at background levels and is expected to remain so over the next days. The greater than 2 MeV electron flux, as measured by the GOES-18 and GOES-19 satellites, were below the 1000 pfu threshold in the last 24 hours. During the next 24 hours, there’s a chance that the electron flux exceeds the 1000 pfu threshold due to the influence of the HSS. The 24-hour electron fluence was at started the period at moderate levels and decreased to nominal levels. The electron fluence is expected to return to nominal over the next 24 hours.

Solar Wind

URSIgram 2025-07-12

The geomagnetic conditions over the past 24 hours reached active conditions globally and locally (Kp 4 & K BEL 4). Active conditions are expected for the next 24 hours. Over the past 24 hours the solar wind conditions at Earth were disturbed, due to a high-speed stream (HSS), associated with SIDC Coronal Hole 104. The solar wind speed ranged from 420 km/s to 518 km/s. The total interplanetary magnetic field ranged from 8 nT to 14 nT, with the Bz component reaching a minimum of -9 nT. The phi-angle was mainly in the positive sector (directed away from the Sun), with periods in the negative sector. The solar wind conditions are expected to remain disturbed in the next 24, due to the influence of the HSS.

Research

News

Prom eruption

Hurray for the prominence eruptions!

Some impressive prominences erupted last week. None of the associated CMEs is directed to Earth.
SDO_SUVI

Superactive regions

Superactive regions represent less than 0.5% of all active regions during a solar cycle, yet they are the source of 30-45% of all X-class flares.
Pulsations in solar flares

Tiny Solar Bursts Show Pulses Like Big Flares

New findings from the European Space Agency’s Solar Orbiter spacecraft reveal that even the tiniest bursts of activity from the Sun may behave like their larger counterparts.

 

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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