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: 2023-06-04


  • Flare: C-class flares
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN: 164

Solar Activity

URSIgram 2023-06-09

The solar flaring activity was at low levels, with several C-class flares being detected in the last 24 hours. The largest flare was a C2.2 flare, peaking at 00:07 UTC on June 08, associated with NOAA AR 3327 (beta-gamma-delta class). This region remains the largest and most complex active region on the disk but produced only low C-class flares. Isolated C-class flaring was produced by NOAA AR 3324 and by NOAA AR 3331 (beta class). NOAA AR 3323 (beta-gamma class) is the second most complex active region on the visible solar disc but remained quiet. Other regions on the disc have simple configuration of their photospheric magnetic field (alpha and beta) and did not show any significant flaring activity. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with a small chance for isolated X-class flare. In the past 24 hours, several coronal mass ejections (CME) and flows were observed in the available SOHO/LASCO coronagraph imagery and automatically detected by the Cactus tool over. In particular, the CME was observed in SOHO/LASCO-C2 at around 21:27 UTC on June 08. The CME is likely related to the small filament eruption in the southwestern quadrant with an accompanying on disc dimming and a type II radio burst detected around 21:14 UTC on June 08. The CME appears narrow and slow and is unlikely to arrive to Earth. However, a full analysis is still ongoing, and more details will be provided later. No other Earth-directed CMEs have been detected in the available coronagraph imagery. 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. The greater than 2 MeV electron flux was below the 1000 pfu threshold and is expected to remain below this threshold for the next days.The 24h electron fluence was at normal level. The electron fluence is expected to be at normal levels in the next days.

Solar Wind

URSIgram 2023-06-09

The geomagnetic conditions over the past 24 hours were quiet. Mostly quiet geomagnetic conditions are expected, with chances of active levels from June 10 if the high speed stream from the positive polarity coronal hole in the northern hemisphere arrives. Over the past 24 hours the solar wind parameters (ACE and DSCOVR) indicated a return to a slow solar wind regime. The solar wind speed decreased from values around 345 km/s to 280 km/s. The interplanetary magnetic field magnitude was about 5 nT. The southward component of the interplanetary magnetic field fluctuated between -5 nT and 4 nT. The magnetic field orientation was in the positive sector (field directed away from the Sun). Slow solar wind conditions are expected to prevail on June 09. From June 10, the solar wind from a coronal hole with positive polarity in the northern hemisphere may arrive to the Earth, but since the coronal hole is located at high latitudes, the corresponding high speed stream may miss the Earth.



USET observes sunspots by eye

There was quite the excitement in USET team last week. Not one, but two sunspot regions were visible with the naked eye!

An M class flare observed with ROB ground based observatories

Ground based optical and radio solar instruments from ROB monitor together the recent period of increased solar activity

EUI can observe both elephants and mice among solar eruptions

The EUI telescope on Solar Orbiter was able to catch the miniature version of solar flares and mass ejections. Thanks to sharp and fast imaging of the EUI telescope, researchers could observe magnetic reconnection taking place repeatedly on very small scales.


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