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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

Presto 2024-06-22

A halo coronal mass ejection (CME) was observed by SOHO/LASCO-C2 at 00:12 UTC on June 22. This event is likely the result of two CMEs erupting simultaneously. The ejection in the eastward direction shows an estimated projected speed of about 1000 km/s and is likely originating from a region on the far side of the Sun. The other ejection, in the south-southwest direction, is much slower and is not expected to reach Earth.

Flaremail 2024-06-23

A class M9.3 solar X-ray flare occurred on 2024/06/23 with peak time 13:01UT

CACTus Halo 2024-06-22

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2024-06-22T00:12:07.482 | 3.0 | 52 | 342 | 845 | 437 | 370 | 1955 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


  • Flare: M-class flares
  • Protons: Quiet
  • Geomagnetic: Active conditions
    (A>=20 or K=4)
  • All quiet: False
  • Provisional SSN: 160

Solar Activity

URSIgram 2024-06-23

Solar flaring activity over the last 24 hours has been at moderate levels, with multiple C-class flares and two M-class flares. The first was an M2.4 flare originating from NOAA active region 3716, peaking at 06:30 UTC on June 23. The second was an M1.3 flare originating from NOAA active region 3712, peaking at 11:37 UTC on June 23. Besides these two regions, there are five other sunspot groups on the disc showing C-class flaring activity. 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 possible, and a small chance of X-class flares. No Earth-directed CME was observed in SOHO/LASCO-C2 coronagraph images over the last 24 hours. The greater than 10 MeV proton flux was below the threshold level over the past 24 hours. It is expected to remain below the threshold level over the next 24 hours. The greater than 2 MeV electron flux was below the threshold level in the last 24 hours and is expected to remain so over the next 24 hours. The 24-hour electron fluence is presently at normal levels and is expected to remain so over the next 24 hours.

Solar Wind

URSIgram 2024-06-23

Geomagnetic conditions were quiet (NOAA Kp 0-2, K BEL 1-3). Later, active conditions to minor storms may be observed in response to the high-speed stream from the large north midlatitude coronal hole. Solar wind conditions initially returned to a slow solar wind regime in the last 24 hours. Around 00:00 UTC on June 23, some solar wind parameters became disturbed, reflecting the imminent arrival of the fast wind originating from the large north midlatitude coronal hole with negative polarity, which reached the central meridian on June 19. The interplanetary magnetic field reached up to 12 nT, and the Bz component varied between -11 nT and 8 nT. The solar wind speed remained below 375 km/s, and the phi angle turned to the negative sector. In the next 24 hours, solar wind conditions are expected to become more enhanced with the increase in solar wind speed.





The fairly recent Hpo geomagnetic index deals with the two major shortcomings of the Kp index.

SC25 update

The STCE's SC25 Tracking page has been updated to reflect the latest evolution of some critical space weather parameters for the ongoing solar cycle 25 (SC25).

Topical Issue "Swarm 10-Year Anniversary"

The Journal of Space Weather and Space Climate (JSWSC) opens the Topical Issue “Swarm 10-Year Anniversary”, dedicated to new results from ESA’s Swarm mission, in particular to investigations of the Magnetosphere-Ionosphere Coupling, Ionospheric and Thermospheric processes, and their implications for Space Weather.


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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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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