Another flare in AR4274
Taken by Francois Rouviere on November 11, 2025 @
Cannes, France
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Details:
Another major flare occurred this morning in AR4274. I could follow it from 9h58 (UT) to 10h30, with its biggest extension at 10h03 (first picture, with a Celestron 8 solar telescope and SolarSpectrum 0.3A H alpha filter). The second picture is a spectroheliogram taken at 10h25 (100 mm refractor with Sol'Ex spectroheliograph, two-image mosaic). The third picture is a dopplergram taken at 10h25 (same equipment). It shows motions in the chromosphere, with blue features moving toward us and red features moving away.
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