Sunspot group 4366 has developed rapidly over the last 24 hours and produced no less than 5 X-class flares. The strongest of these flares seems to have been associated with the ejection of a magnetic cloud ("CME") that may have an earth-directed component. The SIDC space weather forecaster expects an arrival between late on 4 and evening on 5 February, and resulting in a minor to moderate geomagnetic storm. Further strong eruptions from this active region are expected during the coming days. (***UPDATED 3***)

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A concise analysis of the spectacular aurora that were observed during the 19-20 January geomagnetic storm.

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Proba-3/ASPIICS captured three prominence eruptions in five hours during an active period on 21 September 2025.

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The magnetic cloud (CME) associated with yesterday's X1 flare has already arrived. A severe geomagnetic storm is in progress. Spectacular aurora have been observed over Belgium. 

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NOAA 4341 produced a long-duration X1.9 flare during the late afternoon of 18 January. The associated coronal mass ejection is expected to impact the Earth's magnetic field on 20 January, possibly resulting in a major geomagnetic storm. Currently, a proton event is in progress.

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Fundamental Research

The STCE does Fundamental Research.

Public Outreach

Open DoorsThe STCE does public outreach during the STCE Annual Meeting and the Open Doors of the Space Pole in Uccle.

One of the highlights of the Open Doors is always a visit to the Solar Dome. A small introductory presentation is first given in the corridor of the SIDC. Skilled observers and space weather forecasters explain in laymen terminology what sunspots are, how they are observed, why these observations are so important, and how solar eruptions affect us and our technology. Then, the small groups of 10-15 people are guided stairs towards the top of the solar dome. There, the various solar telescopes are shown and their specific applications are discussed. Weather permitting, the visitors can also make solar observations using a projected solar image from the white light solar telescope. During and after the visit, there is plenty of opportunity to ask questions to the guides.

 

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