The STCE does Fundamental Research.
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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