Skip to main content


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: 2024-02-23


  • Flare: M-class flares
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN: 129

Solar Activity

URSIgram 2024-02-28

Solar flaring activity over the past 24 hours was at low levels. The largest flares was a C5.2 flare with peak time at 09:09 UTC on February 28 from the south-east quadrant of the solar disk (around S19E31). Weaker C-class flares were also observed from NOAA ARs 3590, 3594, 3595 and 3596. There are currently 6 numbered active regions on the visible disk. NOAA AR 3590 (beta-gamma-delta) is the largest, most magnetically complex region, and has produced most of the flaring activity in the last 24 hours. All other regions were stable and have alpha or beta magnetic field configurations. NOAA AR 3586 is now beyond the west limb. The solar flaring activity is likely to be at moderate levels over the coming days with C-class flares expected, M-class flares probable, and a small chance for X-class flares. Eruptive signatures (coronal dimming, flare ribbons, and development of a post-eruptive coronal loop arcade) were visible starting around 09:00 UTC on February 28 in SDO/AIA images in association with the C5.2 flare from the south-east quadrant (around S19E31), implying the possibility of an Earth-directed coronal mass ejection (CME). No coronagraph images are currently available to confirm the CME occurrence. However, due to the favourable location of the source region, further investigation will be carried out to determine if and when any associated interplanetary CME (ICME) may be expected to arrive at Earth. Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next days. Some enhancements are possible in the case of an eruptive activity from NOAA AR 3590. The greater than 2 MeV GOES 16 electron flux was below the 1000 pfu threshold and is expected to remain so in the next 24 hours. The 24h electron fluence was at nominal level and is expected to remain so in the next 24 hours.

Solar Wind

URSIgram 2024-02-28

Geomagnetic conditions reached unsettled conditions globally (Kp 3) and remained locally quiet (K Bel 2). Quiet to unsettled conditions are expected in the next 24 hours. In the past 24 hours, the solar wind parameters tended to return to slow solar wind conditions. The solar wind speed ranged between 370 km/s and 440 km/s, and the total interplanetary magnetic field ranged between 2 nT and 5 nT. The Bz (north-south) component reached a minimum value of -4 nT. The phi-angle was mainly in the negative sector (directed towards the Sun), with short periods in the positive sector in the afternoon (UTC) of February 27, and in the early morning (UTC) on February 28. Since around 07:00 UTC on February 28, however, gradual enhancements in the solar wind speed and magnetic field intensity have been recorded. They may indicate the arrival of a small solar wind structure, possibly associated with the small negative-polarity southern coronal hole which finished crossing the solar central meridian on February 25 (high speed solar wind stream expected to arrive at Earth on February 29). In the next 24 hours, we expect the solar wind parameters to progressively return to slow solar wind conditions.



Wuthering Heights

So far this solar cycle, NOAA 13590 is the largest sunspot group and it has produced the strongest solar flare. Some perspective.

More X-class flares

NOAA 3590 produced 3 X-class flares in 24 hours: an X1.8 flare peaking late on 21 February, an X1.7 flare peaking early on 22 February, and an X6.3 event that peaked on 22 February at 22:34UTC. The latter is the strongest flare so far this solar cycle. ***UPDATED.***

A stunning eruption

A stunning double eruption took place near the northeast solar limb on 12 February.


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