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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 2024-05-27

A halo Coronal Mass Ejection (CME) was detected in SOHO/LASCO-C2 data from 07:24 UTC May 27. This CME has a plane of sky speed of around 800km/s and was predominantly directed to the east. It is associated with the X2.8 flare originating from beyond the east limb, with peak time 07:08 UTC on May 27. Due to the location of the source region, initial modelling suggests that the CME is not expected to impact Earth.

Flaremail 2024-05-27

A class X2.9 solar X-ray flare occurred on 2024/05/27 with peak time 07:08UT

CACTus Halo 2024-05-27

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2024-05-27T07:24:07.463 | 4.0 | 144 | 360 | 744 | 445 | 200 | 1838 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: M-class flares
    (≥50%)
  • Protons: Quiet
  • Geomagnetic: Quiet
    (A<20 and K<4)
  • All quiet: False
  • Provisional SSN: 150

Solar Activity

URSIgram 2024-05-28

There are nine visible active regions on the solar disk. Solar activity has been low over the last 24 hours. The largest flare of the period was an C8.9 flare, with peak time 19:16 UTC on May 27 originating from Catania sunspot group 22 (NOAA AR 3691), the most complex region on disk (beta-gamma-delta magnetic field configuration). The expected returning region rotating over the south-east limb, which has been numbered as Catania sunspot group 28 (NOAA AR 3697), also produced C-class flares. The solar flaring activity is expected to be moderate over the next 24 hours with C-class flares expected, M-class flares likely and a low probability for further X-class flares. A halo Coronal Mass Ejection (CME) was detected in SOHO/LASCO-C2 data from 07:24 UTC May 27. This CME has a plane of sky speed of around 800km/s and was predominantly directed to the east. It is associated with the X2.8 flare originating from beyond the east limb, with peak time 07:08 UTC on May 27. Due to the location of the source region, a significant Earth directed component is not expected but a minor shock arrival may be expected on May 29. No other Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery. Over the past 24 hours the greater than 10 MeV GOES proton flux was below the 10pfu threshold and is expected to remain so. There is a slight chance that the proton flux may increase due to strong flaring from NOAA ARs 3697 or 3691, but this is unlikely due in their current position on disk. The greater than 2 MeV electron flux increased slightly but remained below the 1000 pfu threshold as measured by GOES 16. It is expected to remain below this threshold over the next days. The 24-hour electron fluence was at nominal levels. The electron fluence is expected remain at nominal levels over the next day.

Solar Wind

URSIgram 2024-05-28

Geomagnetic conditions were at quiet to unsettled levels (NOAA Kp 3 and Local K Bel 3). Geomagnetic conditions are expected to be mostly at quiet to unsettled levels on May 28, with a chance for active conditions on May 29 in response to the possible shock arrival from the halo CME of May 27. The solar wind conditions reflected a slow solar wind regime with speeds around 350 km/s and an interplanetary magnetic field around 5 nT. The Bz component reached a minimum value of -4 nT. Slow solar wind conditions are expected to continue generally on May 28 and 29. Minor enhancements in the solar wind speed and magnetic field may be possible from late on May 29, due to a possible shock associated with the halo CME of May 27 but this is low confidence.

Research

News

X2flare

Return of the King!

Returning old active region NOAA 3664 produced an X2.8 flare on 27 May. Updates on further activity from this region will be posted here.
NOAA13664

When the dust has settled...

Flare productivity from NOAA 13664 and the extreme geomagnetic storm on 10-11 May rank amongst the most impressive in the space weather domain. A perspective.
Front

The King is dead, long live the King?

While NOAA 3664 has rounded the Sun's west limb, a new X-class flare producing active region has shown up near the Sun's east limb.
 

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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