Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Monthly Sunspot Classification and Coordinates

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February 2025 Monthly report →

Each group: class – number of spots (B, ΔL). NS: No sunspot.

DrawingDayRClassification and Coordinates
03 132 DAI – 25 (14, 04.9W), DKI – 23 (13, 07.5E), AX_ – 2 (20, 13.7E), EKC – 30 (7, 19.0E), AX_ – 2 (-16, 24.6W)
04 119 FKC – 39 (14, 10.4W), EKC – 27 (7, 09.3E), AX_ – 1 (22, 32.8E), ?__ – 1 (6, 73.7E), AX_ – 1 (-17, 35.2W)
05 126 DSI – 11 (16, 28.3W), CAI – 12 (14, 17.7W), AX_ – 1 (16, 11.7W), EKC – 29 (8, 04.9W), AX_ – 1 (20, 21.0E), AX_ – 1 (4, 58.4E), AX_ – 1 (4, 84.1E)
13 82 AX_ – 1 (5, 52.4W), HS_ – 1 (6, 26.6W), HS_ – 1 (18, 22.5E), DAI – 12 (-7, 15.8W), CAI – 5 (-10, 36.7E), AX_ – 2 (-14, 53.7E)
14 118 HS_ – 1 (5, 38.5W), HS_ – 2 (17, 11.4E), HA_ – 1 (14, 72.8E), EAI – 17 (-7, 28.7W), CAO – 4 (-23, 18.8W), DRO – 6 (-20, 06.6E), DKO – 6 (-10, 24.5E), AX_ – 1 (-14, 41.6E)
20 126 HH_ – 1 (19, 67.5W), AX_ – 2 (2, 10.9W), DHO – 4 (16, 05.3W), CSO – 2 (4, 07.5E), CHI – 5 (-10, 53.6W), AX_ – 4 (-7, 32.7W), FHC – 17 (-16, 08.7E), ESC – 11 (-14, 23.9E)
21 150 HR_ – 2 (15, 19.5W), AX_ – 1 (3, 09.7W), AX_ – 1 (6, 03.2W), CAI – 12 (17, 17.8E), HR_ – 1 (10, 72.8E), CSO – 2 (-9, 65.7W), DSI – 10 (-16, 06.6W), HK_ – 5 (-18, 03.8E), DSI – 26 (-13, 10.1E)
23 176 HS_ – 2 (15, 48.2W), DAI – 16 (18, 10.0W), BXI – 5 (14, 15.9E), DAI – 5 (19, 72.3E), HS_ – 1 (-6, 78.3W), CAI – 4 (-15, 38.4W), CAI – 4 (-16, 24.4W), DAC – 34 (-13, 17.3W), BXO – 2 (-5, 50.7E), BXI – 3 (-11, 67.2E)
24 166 HS_ – 1 (15, 59.8W), AX_ – 2 (10, 49.7W), DAC – 13 (18, 22.6W), BXI – 7 (13, 03.3E), EAI – 9 (18, 59.3E), CAO – 2 (-16, 52.9W), EAC – 32 (-13, 31.5W), AX_ – 2 (-5, 36.6E), AX_ – 8 (-12, 57.1E)
26 116 HK_ – 3 (16, 54.6W), AX_ – 1 (22, 48.6W), CKI – 14 (18, 30.9E), HS_ – 1 (5, 61.9E), HS_ – 1 (-14, 82.7W), EKC – 23 (-13, 57.7W), ?__ – 3 (-12, 28.5E)
27 144 HH_ – 1 (15, 70.8W), AX_ – 2 (13, 39.5W), AX_ – 1 (17, 28.7W), ESC – 12 (20, 15.3E), AX_ – 1 (20, 35.1E), AX_ – 1 (12, 39.1E), AX_ – 1 (6, 45.8E), BXO – 3 (24, 51.2E), HH_ – 1 (-16, 81.7W), EHI – 5 (-12, 74.6W), CSI – 6 (-13, 15.7E)