Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

H-α Chromosphere Archive

883 observation days · 5,346 images · 2020–2026 · How are the images made?

Years

20201 days 2021155 days 2022177 days 2023190 days 2024171 days 2025120 days 202669 days

Coronado H-α films of 2026 4 films

Stabilised films; the brightness scale is fixed for the whole film, so a flare shows up as a brightening. Click to open the day page (film, light curve, raw data).

Coronado H-α 21.1021.10 10:37 UT ▶ Chromosphere (SER video) 11.1011.10 10:08 UT ▶ Chromosphere (SER video) 11.1011.10 10:07 UT ▶ Chromosphere (SER video) 11.1011.10 10:07 UT ▶

H-α images of 2026 69 days · 367 frames

Sharpest frame of each day All frames

Click an image to enlarge it (use the ← → keys to browse); “Observation details” opens all data of that day. Frames without the Sun (darks, bias) are not shown.

February

H-α 14.0214.02 · 2 frames H-α 19.0219.02 · 9 frames H-α 21.0221.02 · 2 frames

March

H-α 02.0302.03 · 4 frames H-α 07.0307.03 · 6 frames H-α 09.0309.03 · 2 frames H-α 11.0311.03 · 8 frames

April

H-α 06.0406.04 · 6 frames H-α 23.0423.04 · 1 frame H-α 24.0424.04 · 6 frames

May

H-α 06.0506.05 · 6 frames H-α 17.0517.05 · 4 frames H-α 25.0525.05 · 4 frames H-α 30.0530.05 · 6 frames

June

H-α 01.0601.06 · 1 frame H-α 03.0603.06 · 6 frames H-α 14.0614.06 · 7 frames H-α 20.0620.06 · 6 frames H-α 28.0628.06 · 7 frames

July

H-α 02.0702.07 · 6 frames H-α 03.0703.07 · 6 frames H-α 06.0706.07 · 6 frames H-α 07.0707.07 · 6 frames H-α 08.0708.07 · 6 frames H-α 12.0712.07 · 6 frames H-α 13.0713.07 · 2 frames H-α 14.0714.07 · 4 frames H-α 15.0715.07 · 6 frames H-α 17.0717.07 · 6 frames H-α 18.0718.07 · 3 frames H-α 19.0719.07 · 4 frames H-α 20.0720.07 · 6 frames H-α 21.0721.07 · 6 frames H-α 22.0722.07 · 4 frames H-α 24.0724.07 · 4 frames H-α 30.0730.07 · 6 frames H-α 31.0731.07 · 6 frames

August

H-α 04.0804.08 · 6 frames H-α 05.0805.08 · 6 frames H-α 06.0806.08 · 6 frames H-α 07.0807.08 · 6 frames H-α 11.0811.08 · 6 frames H-α 12.0812.08 · 6 frames H-α 13.0813.08 · 6 frames H-α 14.0814.08 · 3 frames H-α 15.0815.08 · 5 frames H-α 16.0816.08 · 6 frames H-α 17.0817.08 · 6 frames H-α 18.0818.08 · 6 frames H-α 20.0820.08 · 6 frames H-α 21.0821.08 · 6 frames H-α 23.0823.08 · 4 frames H-α 24.0824.08 · 4 frames H-α 25.0825.08 · 5 frames H-α 26.0826.08 · 6 frames H-α 27.0827.08 · 4 frames H-α 28.0828.08 · 8 frames H-α 31.0831.08 · 3 frames

September

H-α 01.0901.09 · 6 frames H-α 02.0902.09 · 6 frames H-α 03.0903.09 · 6 frames H-α 05.0905.09 · 6 frames H-α 06.0906.09 · 6 frames

October

H-α 04.1004.10 · 4 frames H-α 10.1010.10 · 6 frames H-α 11.1011.10 · 7 frames H-α 12.1012.10 · 4 frames H-α 20.1020.10 · 8 frames H-α 21.1021.10 · 8 frames