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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

Presto 2025-06-20

A X1.9 flare (SIDC 4707) was observed in the GOES 19 X ray flux data with start time 23:37 UTC, peak time 23:50 UTC and end time 23:54 UTC on June 19. The flare is associated with SIDC Sunspot Group 523 (NOAA Active Region 4114), which is now classified as magnetic type beta-gamma. No proton event has been associated to the flaring activity and no coronal mass ejection (CME) is observed in the available coronagraph data. M-class flaring related to this region is likely with small chances for more X-class flaring.

Flaremail 2025-06-20

A class X1.9 solar X-ray flare occurred on 2025/06/19 with peak time 23:50UT

CACTus Halo 2025-06-19

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2025-06-18T05:00:07.635 | 2.0 | 282 | 154 | 423 | 210 | 134 | 892 t0: onset time, earliest indication of liftoff dt0: duration of liftoff (hours) pa: principal angle, counterclockwise from North (degrees) da: angular width of the CME (degrees), v: median velocity (km/s) dv: variation (1 sigma) of velocity over the width of the CME mindv: lowest velocity detected within the CME maxdv: highest velocity detected within the CME

Forecasts

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

Solar Activity

URSIgram 2025-06-23

Solar flaring activity was low over the past 24 hours, with only C-class flares identified. The largest flare was a C3.4 flare peaking at 05:47 UTC on June 23, which was produced by a back-sided sunspot group on the NW limb. A total of 5 numbered sunspot groups were identified on the disk over the past 24 hours. Four sunspot groups (SIDC Sunspot Groups 522, 523, 526, and 527) have beta magnetic configurations. The solar flaring activity is expected to be at low to moderate levels over the next 24 hours with C-class flares expected, M-class flares probable, and a small chance of X-class flares. No Earth-directed coronal mass ejections (CME) were detected in the available coronagraph observations during last 24 hours. SIDC Coronal Hole 116 (negative polarity), which spans from 20 S to 30 N, is still crossing the central meridian. The high speed stream from this coronal hole are expected to enhance the solar wind environment near Earth on Jun 24-25. The greater than 10 MeV GOES proton flux was below the threshold level over the past 24 hours and is expected to remain so for the next 24 hours. If any major flare occurs from SIDC Sunspot Group 523 (NOAA Active Region 4114), which is presently closer to the W limb, it could possibly be associated with a proton event in the coming hours. The greater than 2 MeV electron flux, as measured by GOES-19, remained below the 1000 pfu threshold level over the past 24 hours. The greater than 2 MeV electron flux, as measured by GOES-18 satellite, mostly remained below the threshold level, except from 17:45 UTC to 22:30 UTC on Jun 22, when it fluctuated around the threshold level. In the next 24 hours, the electron flux is expected to remain below the threshold level, but increasing above the threshold level cannot be excluded. The 24h electron fluence is presently at normal level, and it is expected to remain so in the next 24 hours.

Solar Wind

URSIgram 2025-06-23

Geomagnetic conditions were at quiet to unsettled conditions (NOAA Kp 1 to 3) both globally and locally. We expect quiet to unsettled conditions (K 1 to 3) in the next 24 hours unless the high speed stream, from the SIDC Coronal Hole 116 (negative polarity) which started to cross the central meridian on Jun 21, arrives earlier at Earth. Solar wind conditions are transitioning from fast to slow solar wind. The solar wind speed ranged from 355 km/s to 530 km/s. The North-South component (Bz) ranged between -6 nT and 5 nT. The interplanetary magnetic field ranged between 3 nT and 7 nT. In the next 24 hours, we expect a transition to slow solar wind conditions unless the high speed stream, from the SIDC Coronal Hole 116 (negative polarity) which started to cross the central meridian on Jun 21, arrives earlier at Earth.

Research

News

SC25 max

SC25 maximum in October 2024

The STCE's SC25 Tracking page has been updated. The latest SIDC/SILSO provisional data indicate that SC25 reached a maximum smoothed monthly sunspot number of 160.8 in October 2024.
AIA1700_X1

X-class flares

SIDC Sunspot Group 523 (NOAA Active Region 4114) produced an X1.2 flare on 17 June and an X1.9 flare late on 19 June. No coronal mass ejection seems to have been associated with these flares. ***UPDATED (1)***
Proba-3 first light image low resolution

Proba-3: first eclipse images

This is the image of the duo-satellite Proba-3 making solar eclipses, just released by the European Space Agency, ESA. 
 

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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