Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Monthly Sunspot Classification and Coordinates

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August 2024 Monthly report →

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

DrawingDayRClassification and Coordinates
01 226 HH_ – 1 (5, 54.7W), DHC – 11 (9, 34.0W), HH_ – 1 (22, 05.6E), BXI – 4 (10, 42.7E), CRI – 5 (18, 53.4E), EHO – 5 (-16, 72.5W), BXO – 2 (-7, 65.3W), FHC – 58 (-8, 37.4W), BXO – 3 (-18, 25.5W), EHC – 16 (-23, 40.9E), DKC – 10 (-6, 63.6E)
02 183 HH_ – 1 (5, 67.3W), DHC – 9 (9, 47.0W), HH_ – 1 (22, 07.2W), BXO – 3 (10, 29.3E), DHC – 9 (19, 41.7E), FHC – 28 (-7, 51.8W), BXO – 2 (-18, 40.5W), DKC – 14 (-24, 26.8E), FHC – 26 (-8, 55.9E)
03 199 HS_ – 1 (6, 77.2W), CAI – 9 (9, 58.8W), HS_ – 2 (23, 18.5W), AX_ – 2 (10, 13.8E), DAI – 13 (18, 30.3E), DSI – 3 (-3, 74.3W), CAI – 5 (-6, 65.8W), FAC – 10 (-10, 59.5W), DAC – 20 (-21, 16.4E), DAI – 18 (-8, 38.4E), CAI – 6 (-9, 58.2E)
04 184 CSO – 2 (8, 74.0W), AX_ – 1 (4, 35.3W), HH_ – 1 (23, 31.3W), AX_ – 1 (8, 07.8E), DAC – 11 (19, 17.9E), HR_ – 1 (-8, 70.5W), EHI – 12 (-24, 03.4E), EHC – 24 (-5, 26.2E), DAI – 9 (-13, 26.8E), CSI – 6 (-9, 45.9E), ?__ – 6 (-10, 79.2E)
05 190 HK_ – 5 (23, 42.5W), DRO – 12 (19, 07.0E), DSO – 2 (14, 78.5E), EKI – 15 (-24, 08.6W), EKC – 35 (-6, 13.9E), CAO – 10 (-14, 15.0E), DSI – 7 (-7, 29.5E), FKI – 24 (-11, 71.6E)
06 211 HK_ – 2 (23, 55.2W), CRI – 11 (19, 06.3W), DSO – 2 (15, 61.6E), EKO – 14 (-24, 21.1W), EHC – 46 (-6, 00.5E), ?__ – 18 (-8, 18.9E), BXI – 16 (-12, 47.6E), FKC – 22 (-9, 59.2E)
07 253 HA_ – 2 (23, 67.3W), CSO – 6 (19, 19.4W), AX_ – 2 (11, 41.6E), DSO – 3 (14, 50.7E), HK_ – 3 (2, 75.5E), FKO – 13 (-25, 33.9W), EKC – 33 (-6, 11.2W), HA_ – 6 (-10, 10.6W), EKC – 18 (-8, 05.3E), AX_ – 3 (-6, 30.2E), BXI – 20 (-13, 35.6E), FKC – 24 (-10, 47.3E)
08 283 BXO – 2 (17, 37.8W), AX_ – 1 (20, 30.7W), DSI – 10 (11, 25.6E), DSI – 6 (15, 34.8E), HA_ – 6 (3, 57.7E), HA_ – 2 (1, 69.4E), HS_ – 2 (-24, 54.7W), ESC – 41 (-7, 28.8W), EAC – 28 (-8, 09.9W), AX_ – 3 (-6, 14.9E), CRI – 11 (-10, 18.3E), DKI – 27 (-12, 25.8E), CRI – 14 (-8, 35.8E)
09 267 BXO – 5 (18, 49.9W), CAO – 7 (10, 11.9E), DSI – 7 (15, 21.2E), CAO – 4 (4, 43.5E), AX_ – 4 (1, 54.6E), HK_ – 2 (15, 68.7E), HS_ – 1 (-24, 67.2W), EAC – 21 (-5, 41.5W), EAC – 28 (-7, 24.4W), BXO – 3 (-6, 01.5E), CAI – 10 (-12, 05.1E), EKI – 32 (-9, 12.8E), CAI – 13 (-9, 23.8E)
10 253 AX_ – 1 (18, 61.7W), BXO – 3 (10, 01.8W), CSO – 6 (15, 08.8E), AX_ – 1 (19, 21.6E), DSO – 4 (3, 30.5E), DRI – 9 (1, 39.8E), HK_ – 4 (15, 56.6E), HS_ – 1 (-25, 79.6W), DSI – 11 (-6, 53.6W), EAC – 17 (-8, 37.4W), CRO – 6 (-10, 09.0W), EKC – 32 (-9, 00.4E), CAI – 17 (-8, 11.0E), AX_ – 1 (-10, 67.2E)
11 221 BXO – 3 (10, 14.6W), HS_ – 1 (15, 06.5W), AX_ – 4 (18, 08.0E), CSI – 13 (2, 23.8E), HK_ – 7 (15, 42.6E), CSO – 2 (-6, 68.2W), FSC – 11 (-8, 51.1W), BXI – 8 (-10, 22.9W), DKI – 32 (-10, 12.4W), CAI – 12 (-8, 02.1W), CRO – 4 (-22, 08.6E), BXO – 4 (-11, 55.4E)
12 220 AX_ – 1 (11, 29.8W), CAI – 5 (15, 18.9W), CAI – 5 (18, 04.8W), DAI – 10 (3, 11.5E), CKI – 17 (15, 30.9E), EAI – 11 (-8, 62.2W), FKC – 39 (-9, 21.3W), CAI – 21 (-21, 03.5W), AX_ – 1 (-8, 34.9E), CAI – 10 (-6, 60.0E)
13 211 AX_ – 1 (12, 43.4W), BXI – 2 (15, 33.1W), BXI – 2 (18, 18.6W), CAI – 5 (4, 05.2W), DKC – 26 (14, 17.3E), DAI – 3 (-10, 73.5W), FKC – 28 (-9, 37.8W), DAI – 9 (-22, 16.2W), AX_ – 2 (-10, 01.6W), BXI – 7 (-9, 29.2E), DAI – 16 (-7, 44.9E)
14 211 CSO – 2 (14, 49.2W), CSI – 13 (3, 13.9W), EKI – 27 (15, 04.9E), BXO – 6 (27, 35.7E), AX_ – 1 (-8, 82.5W), FKI – 27 (-9, 53.4W), DSI – 11 (-22, 29.9W), BXO – 2 (-9, 13.7W), CRI – 14 (-9, 17.9E), DHI – 8 (-7, 32.8E)
15 206 AX_ – 1 (12, 70.4W), HS_ – 1 (16, 58.5W), CSO – 4 (4, 28.6W), FKC – 46 (16, 09.6W), AX_ – 1 (29, 23.9E), FHI – 16 (-9, 61.3W), ESC – 19 (-22, 43.9W), BXI – 10 (-13, 03.3E), CSI – 7 (-6, 23.5E), AX_ – 1 (-18, 68.2E)
16 175 CHO – 2 (18, 66.3W), AX_ – 2 (5, 49.0W), EKC – 19 (16, 25.3W), DAI – 9 (27, 07.5E), HH_ – 1 (-8, 77.7W), ESI – 7 (-21, 58.9W), AX_ – 1 (-8, 48.3W), CAI – 13 (-10, 11.5W), CSO – 4 (-7, 02.4E), BXO – 2 (-18, 53.9E), FHC – 5 (-14, 73.3E)
17 160 DKC – 12 (16, 35.1W), DRI – 8 (27, 04.4W), AX_ – 1 (18, 38.9E), DRO – 4 (21, 56.5E), CSO – 2 (-22, 72.4W), DRI – 17 (-14, 23.3W), CSO – 3 (-7, 09.3W), AX_ – 2 (-17, 43.7E), DSI – 10 (-12, 55.0E), HH_ – 1 (-16, 69.8E)
18 193 DKC – 23 (17, 51.0W), BXI – 12 (28, 19.5W), CAO – 10 (19, 24.2E), DSI – 6 (22, 40.9E), CRI – 14 (-13, 41.2W), HS_ – 1 (-7, 26.5W), AX_ – 2 (-17, 27.6E), EHC – 18 (-11, 40.3E), HH_ – 1 (-16, 54.5E), ?__ – 6 (-3, 77.7E)
19 205 DKI – 15 (18, 60.9W), BXI – 10 (28, 29.1W), DSC – 16 (19, 13.9E), CAI – 12 (22, 30.7E), CSI – 8 (-13, 52.4W), HS_ – 1 (-8, 37.4W), BXI – 11 (-4, 15.9W), EKC – 16 (-11, 29.8E), HH_ – 1 (-16, 44.4E), ?__ – 15 (-3, 63.3E)
20 232 EHO – 5 (16, 71.6W), CRI – 12 (27, 42.7W), EHI – 20 (19, 00.1W), DAI – 10 (21, 17.4E), HH_ – 1 (6, 71.4E), CKI – 9 (-14, 65.6W), CSO – 2 (-7, 50.8W), CRO – 4 (-4, 30.3W), EKC – 24 (-11, 15.6E), CHO – 2 (-17, 31.3E), EKC – 11 (-3, 52.7E), AX_ – 1 (-11, 63.4E), HH_ – 1 (-8, 84.1E)
21 172 BXO – 2 (27, 58.6W), DSI – 10 (19, 16.2W), AX_ – 2 (21, 00.9E), AX_ – 1 (28, 09.3E), HS_ – 2 (7, 54.6E), HS_ – 1 (-7, 65.4W), BXO – 2 (-5, 46.4W), EHC – 22 (-11, 00.4W), CHO – 4 (-17, 14.5E), AX_ – 1 (-10, 46.5E), BXO – 2 (-27, 51.7E), CSO – 3 (-10, 70.5E)
22 229 AX_ – 1 (25, 73.6W), EHI – 13 (19, 26.9W), AX_ – 1 (27, 15.9W), BXI – 7 (22, 08.4W), HS_ – 1 (7, 43.9E), CHO – 2 (7, 74.4E), HK_ – 1 (-8, 77.6W), EHC – 29 (-11, 08.9W), CHI – 7 (-16, 04.4E), DHC – 24 (-2, 23.3E), AX_ – 1 (-10, 35.3E), CSO – 5 (-27, 40.6E), EHC – 7 (-9, 60.4E)
23 190 DSI – 6 (18, 42.0W), AX_ – 2 (23, 22.4W), AX_ – 1 (13, 00.2E), HS_ – 1 (6, 30.5E), CAI – 8 (9, 60.5E), BXO – 2 (22, 60.5E), EKC – 16 (-11, 24.6W), HK_ – 3 (-17, 10.1W), EAC – 16 (-3, 08.2E), DSI – 11 (-27, 26.7E), EKC – 14 (-10, 45.6E)
24 252 CAI – 10 (19, 53.3W), BXO – 3 (30, 21.4W), HS_ – 1 (10, 09.3E), HS_ – 1 (7, 18.2E), HS_ – 1 (21, 46.9E), CAI – 9 (8, 48.5E), DAC – 21 (-10, 36.6W), CAI – 8 (-16, 21.1W), DAC – 30 (-3, 04.5W), AX_ – 2 (-8, 11.7E), DAC – 26 (-27, 15.2E), DAC – 20 (-10, 32.4E)
25 193 HS_ – 1 (17, 69.9W), BXO – 3 (13, 24.6W), HS_ – 1 (6, 05.6E), CAI – 7 (7, 36.3E), DAC – 17 (-11, 48.6W), CAI – 5 (-17, 33.4W), DAI – 16 (-4, 16.4W), DAC – 30 (-27, 03.6E), DAC – 23 (-9, 19.5E)
26 227 HH_ – 1 (17, 82.3W), BXO – 2 (22, 60.7W), BXI – 4 (14, 40.3W), HS_ – 1 (7, 08.9W), BXI – 5 (13, 01.6E), DAI – 9 (7, 20.6E), DHO – 3 (14, 82.0E), DKC – 8 (-12, 64.6W), HH_ – 3 (-17, 49.2W), DHC – 18 (-3, 31.6W), EKI – 28 (-26, 11.4W), EHI – 14 (-10, 05.4E), HH_ – 1 (-24, 71.4E)
27 194 BXO – 4 (13, 55.7W), HS_ – 2 (7, 24.5W), ESI – 7 (8, 09.4E), AX_ – 1 (8, 56.7E), DSO – 5 (14, 62.6E), DHC – 3 (-11, 77.1W), HH_ – 3 (-17, 63.0W), DSI – 18 (-4, 46.8W), FKC – 23 (-28, 26.1W), EKI – 17 (-11, 10.2W), HH_ – 1 (-24, 56.6E)
28 188 AX_ – 1 (13, 68.6W), HS_ – 1 (7, 35.3W), DSO – 5 (8, 04.9W), AX_ – 1 (8, 45.6E), DSC – 6 (15, 51.8E), HH_ – 2 (-17, 73.3W), DSI – 9 (-4, 57.7W), FHC – 17 (-26, 36.7W), CHI – 8 (-11, 20.5W), BXO – 3 (-16, 34.4E), AX_ – 1 (-8, 43.3E), HS_ – 1 (-24, 45.5E), DHO – 3 (-10, 79.0E)
29 158 HR_ – 1 (7, 48.9W), DSI – 4 (8, 18.3W), AX_ – 2 (7, 09.3W), AX_ – 1 (21, 40.3E), CAI – 12 (13, 40.4E), BXO – 2 (23, 55.3E), BXO – 3 (-3, 72.7W), FHI – 14 (-27, 49.6W), HK_ – 3 (-11, 36.6W), HS_ – 1 (-25, 33.7E), ?__ – 5 (-10, 66.8E)
30 148 HS_ – 1 (7, 61.9W), DSI – 6 (9, 27.3W), CSI – 6 (15, 27.9E), FHO – 5 (-27, 62.9W), DHC – 4 (-10, 48.2W), DAI – 17 (-15, 07.8E), CSO – 3 (-23, 21.5E), FKI – 26 (-10, 59.7E)
31 195 AX_ – 1 (7, 76.1W), CSI – 5 (8, 45.9W), CSI – 7 (15, 13.1E), CRO – 2 (-28, 69.1W), DKC – 6 (-11, 64.6W), EHC – 22 (-16, 09.4W), CHI – 6 (-22, 04.4E), FKC – 40 (-9, 44.6E), HS_ – 1 (-20, 47.8E), CHO – 5 (-8, 75.7E)