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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 2023-12-02

A partial halo Coronal Mass Ejection (CME) can be seen in LASCO-C2/SOHO images starting from yesterday 22:12 UTC. It is likely to be geo-effective and arrive at the first half of 5 Dec. A partial halo CME that can also been seen in LASCO-C2/SOHO images as lunched yesterday 03:12 UTC is associated with a flare at the west solar limb and is not expected to be geo-effective.

Flaremail 2023-11-28

A class M9.9 solar X-ray flare occurred on 2023/11/28 with peak time 19:50UT

CACTus Halo 2023-11-29

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2023-11-28T20:24:07.481 | 3.0 | 192 | 202 | 411 | 89 | 219 | 589 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: 101

Solar Activity

URSIgram 2023-12-02

Solar flaring activity was moderate during the past 24 hours with an M1 flare from NOAA Active Region (AR) 3500 (magnetic configuration Beta-Gamma, Catania group 65) detected yesterday at 21:20 UTC. Most of the frequent C-class flaring activity was emitted from NOAA AR 3500 and NOAA AR 3492 (magnetic type Beta, Catania group 58). C-class flaring activity is highly expected in the next 24 hours. Isolated M-class flares are possible and there is a small chance of an X-class flare. A partial halo Coronal Mass Ejection (CME) can be seen in LASCO-C2/SOHO images starting from yesterday 22:12 UTC. It is likely to be geo-effective and arrive at the first half of 5 Dec. A partial halo CME that can also been seen in LASCO-C2/SOHO images as lunched yesterday 03:12 UTC is associated with a flare on the west solar limb and is not expected to be geo-effective. The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to remain so for the next 24 hours. The greater than 2 MeV electron flux, as measured by the GOES-16 satellite, was below the 1000 pfu alert threshold during the last 24 hours and is expected to to remain below this threshold during the next 24 hours. The 24h electron fluence was at low levels during the past 24 hours and is expected to remain at these levels for the following 24 hours.

Solar Wind

URSIgram 2023-12-02

Geomagnetic conditions dropped from moderate storm conditions (NOAA Kp and K BEL 6) yesterday at 12:00-15:00 UTC to quiet conditions (NOAA Kp 2, K BEL 1) today at 09:00-12:00 UTC. They are expected to increase again to active or minor storm conditions in the next 24 hours as a result of the expected arrival of another Coronal Mass Ejection (CME). The Solar Wind (SW) conditions are in the process of returning to a typical slow SW regime. The SW speed gradually dropped from 540 km/s to 450 km/s during the last 24 hours. The total interplanetary magnetic field (Bt) dropped from 27 nT during the height of the disturbance to 5 nT. The North-South magnetic component (Bz) varied between -19 and 27 nT during the Coronal Mass Ejection (CME) arrival, but it has lately stabilised to around 5 nT. The interplanetary magnetic field phi angle was predominantly directed towards the Sun during the past 24 hours. The SW conditions are expected to be affected by another CME arrival in the next 24 hours.

Research

News

Numerous sunspots, few strong flares

While the daily sunspot number skyrocketed last week, the number of strong flares was quite modest.

Strong geomagnetic storms

So far, ongoing solar cycle 25 (SC25) has been geomagnetically more active than its predecessor SC24, but remains overall well below the long-term average of SC17 to 23.

Filament eruptions and polar lights

A trio of earth-directed CMEs resulted in a major geomagnetic storm.
 

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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