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1024 observation(s) found

Observation du 24 Mars 2026
Calcium (K)
by Piluc17 March 24, 2026
#calciumk#calcium-cak-cak1v
Calcium Cak1v-Colorisé
Calcium Cak
Observation du 24 Mars 2026
Calcium (H)
by Piluc17 March 24, 2026
#calciumh#calcium-cah-cah1v
Calcium Cah1v-colorisée
Calcium Cah
Observation du 24 Mars 2026
H-alpha
by Piluc17 March 24, 2026
#h-alpha#taches-solaires#protubrances#doppler
h-alpha-colorisé
Ha2cb-colorisé
Doppler
Mix-Halpha-protubérances
H-alpha - 2025-11-11
H-alpha
by Stephan Schmelzing November 11, 2025 1
#h-alpha
Processed solar disk (continuum)
Mix
Virtual eclipse
Processed solar disk
On November 11, 2025, active region AR 4274 produced an exceptionally powerful X5.1 flare at 10:04 UT during the ongoing Solar Cycle 25. As of now, this flare is the most energetic solar eruption of the year 2025. By chance, I had observed the region shortly beforehand in several spectral lines using a spectroheliograph—my spectroheliogram was taken just 23 minutes before the flare. It was actually only a brief scan under modest seeing conditions, but in retrospect it is fascinating to see what the region looked like shortly before such a strong event.
H-alpha - 2026-03-21 (with Ellerman-bomb)
H-alpha
by Stephan Schmelzing March 21, 2026
#h-alpha
Processed solar disk (continuum)
Processed solar disk
Mix
Colorized (H-alpha)
Tomography
Ellerman-bomb
H-alpha - 2026-03-24
H-alpha
by Trifouillax March 24, 2026 1
#h-alpha
Disque solaire traité
Doppler
Fiche technique
Eclipse Doppler
FAir Seeing
H-alpha - 2026-03-04
H-alpha
by Stephan Schmelzing March 4, 2026
#h-alpha
Virtual eclipse
Mix
Processed solar disk
Solar disk (continuum)
Colorized (H-alpha)
One of my best Scans
H-alpha - 2026-03-18 (M2.7 -flare with spectral analysis)
H-alpha
by Stephan Schmelzing March 18, 2026 1
#h-alpha
Virtual eclipse
Doppler
Flares (continuum)
M2.7 Flare: Timeline
M2.7 flare intensity diagramm shows "wing dimming" during the Flare-Peak!
Delta-Lambda-Scan: Flare Peak in AR 4392
H-alpha spectroheliogram
M2.7 Flare
Calcium (H) - 2026-03-22
Calcium (H)
by Stephan Schmelzing March 22, 2026 1
#calciumh
Processed solar disk
Processed solar disk (continuum)
Mix
Virtual eclipse
Solar disk (continuum)
Colorized (Calcium (H))
Calcium (K) - 2026-03-22
Calcium (K)
by Stephan Schmelzing March 22, 2026 1
#calciumk
Processed solar disk
Processed solar disk (continuum)
Mix
Virtual eclipse
Solar disk
Colorized (Calcium (K))
Solar disk (continuum)
Sodium (D2) - 2026-03-22
Helium (D3), Sodium (D2)
by Stephan Schmelzing March 22, 2026
#sodiumd2
Helium D3 (extracted, colorized)
Colorized (Sodium (D2))
Mix
Magnesium (b1) - 2026-03-22
Magnesium (b1)
by Stephan Schmelzing March 22, 2026
#magnesiumb1
Processed solar disk
Mix
Colorized (Magnesium (b1))