Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Sunspot Records 1950–2007

13,360 / 15,663 sheets usable

Years usable / all sheets

19502 / 9 1951253 / 266 1952270 / 291 1953287 / 303 1954286 / 292 1955284 / 299 1956270 / 299 1957262 / 299 1958264 / 307 1959231 / 280 1960235 / 271 1961233 / 261 1962210 / 254 1963194 / 258 1964246 / 274 1965245 / 280 1966224 / 261 1967244 / 297 1968241 / 278 1969224 / 266 1970262 / 291 1971274 / 283 1972231 / 251 1973263 / 303 1974279 / 292 1975280 / 302 1976257 / 287 1977246 / 275 1978239 / 271 1979209 / 285 1980207 / 256 1981248 / 288 1982254 / 301 1983229 / 295 1984260 / 290 1985271 / 292 1986262 / 278 1987221 / 254 1988215 / 272 1989187 / 209 1990168 / 293 1991217 / 252 1992222 / 273 1993241 / 265 1994257 / 283 1995266 / 275 1996111 / 235 1997218 / 237 1998211 / 248 1999181 / 265 2000173 / 272 2001203 / 276 200282 / 279 2003239 / 252 2004266 / 280 2005216 / 236 2006221 / 238 2007269 / 284

Sheets of 1960 271 sheets · 235 usable · mean R 132.5

DrawingDategfRReading
02.01.1960 1459199 all checks consistent
09.01.1960 12129249 all checks consistent
13.01.1960 953143 all checks consistent
15.01.1960 1243163 all checks consistent
16.01.1960 1154164 all checks consistent
17.01.1960 1156166 all checks consistent
19.01.1960 731101 all checks consistent
20.01.1960 839119 all checks consistent
22.01.1960 973163 all checks consistent
23.01.1960 967157 all checks consistent
24.01.1960 954144 all checks consistent
25.01.1960 11120230 all checks consistent
26.01.1960 11124234 all checks consistent
27.01.1960 10149249 all checks consistent
29.01.1960 11128238 all checks consistent
30.01.1960 1185195 all checks consistent
31.01.1960 13117247 all checks consistent
02.02.1960 1471211 all checks consistent
03.02.1960 1383213 all checks consistent
05.02.1960 1264184 all checks consistent
10.02.1960 1377207 all checks consistent
12.02.1960 965155 all checks consistent
13.02.1960 744114 all checks consistent
14.02.1960 649109 all checks consistent
17.02.1960 551101 all checks consistent
18.02.1960 53080 all checks consistent
19.02.1960 32151 all checks consistent
20.02.1960 62383 all checks consistent
23.02.1960 ——— reading could not be verified
24.02.1960 738108 all checks consistent
25.02.1960 857137 all checks consistent
26.02.1960 54696 all checks consistent
29.02.1960 738108 all checks consistent
01.03.1960 63393 all checks consistent
02.03.1960 52878 all checks consistent
07.03.1960 846126 all checks consistent
08.03.1960 863143 all checks consistent
12.03.1960 833113 all checks consistent
13.03.1960 62484 all checks consistent
14.03.1960 72797 all checks consistent
15.03.1960 951141 all checks consistent
16.03.1960 860140 all checks consistent
17.03.1960 54696 all checks consistent
19.03.1960 650110 all checks consistent
24.03.1960 8101181 all checks consistent
25.03.1960 994184 all checks consistent
26.03.1960 1179189 all checks consistent
27.03.1960 959149 all checks consistent
28.03.1960 ——— reading could not be verified
29.03.1960 1079179 all checks consistent
30.03.1960 9107197 all checks consistent
31.03.1960 571121 all checks consistent
01.04.1960 657117 all checks consistent
03.04.1960 1083183 all checks consistent
05.04.1960 ——— reading could not be verified
09.04.1960 ——— reading could not be verified
10.04.1960 ——— reading could not be verified
11.04.1960 989179 all checks consistent
12.04.1960 1080180 all checks consistent
13.04.1960 761131 all checks consistent
18.04.1960 574124 all checks consistent
19.04.1960 565115 all checks consistent
22.04.1960 ——— reading could not be verified
23.04.1960 655115 all checks consistent
24.04.1960 63696 all checks consistent
25.04.1960 ——— reading could not be verified
26.04.1960 ——— reading could not be verified
27.04.1960 656116 all checks consistent
28.04.1960 54595 all checks consistent
30.04.1960 54595 all checks consistent
02.05.1960 63393 all checks consistent
03.05.1960 739109 all checks consistent
04.05.1960 851131 all checks consistent
05.05.1960 648108 all checks consistent
10.05.1960 ——— reading could not be verified
12.05.1960 845125 all checks consistent
13.05.1960 946136 all checks consistent
16.05.1960 ——— reading could not be verified
17.05.1960 678138 all checks consistent
18.05.1960 867147 all checks consistent
20.05.1960 557107 all checks consistent
21.05.1960 757127 all checks consistent
23.05.1960 ——— reading could not be verified
24.05.1960 972162 all checks consistent
26.05.1960 ——— reading could not be verified
28.05.1960 1056156 all checks consistent
30.05.1960 ——— reading could not be verified
31.05.1960 760130 all checks consistent
01.06.1960 582132 all checks consistent
02.06.1960 664124 all checks consistent
03.06.1960 569119 all checks consistent
04.06.1960 771141 all checks consistent
09.06.1960 1061161 all checks consistent
10.06.1960 1174184 all checks consistent
11.06.1960 796166 all checks consistent
15.06.1960 1091191 all checks consistent
16.06.1960 1192202 all checks consistent
17.06.1960 933123 all checks consistent
18.06.1960 821101 all checks consistent
19.06.1960 731101 all checks consistent
20.06.1960 738108 all checks consistent
21.06.1960 52878 all checks consistent
22.06.1960 42262 all checks consistent
23.06.1960 63090 all checks consistent
25.06.1960 649109 all checks consistent
26.06.1960 764134 all checks consistent
27.06.1960 ——— reading could not be verified
28.06.1960 ——— reading could not be verified
29.06.1960 1084184 all checks consistent
30.06.1960 11119229 all checks consistent
01.07.1960 11130240 all checks consistent
02.07.1960 8120200 all checks consistent
03.07.1960 784154 all checks consistent
04.07.1960 995185 all checks consistent
05.07.1960 ——— reading could not be verified
06.07.1960 11111221 all checks consistent
07.07.1960 995185 all checks consistent
08.07.1960 1069169 all checks consistent
09.07.1960 863143 all checks consistent
10.07.1960 752122 all checks consistent
11.07.1960 741111 all checks consistent
12.07.1960 53686 all checks consistent
13.07.1960 739109 all checks consistent
14.07.1960 53989 all checks consistent
15.07.1960 555105 all checks consistent
16.07.1960 955145 all checks consistent
17.07.1960 873153 all checks consistent
18.07.1960 10108208 all checks consistent
19.07.1960 ——— reading could not be verified
20.07.1960 ——— reading could not be verified
21.07.1960 1172182 all checks consistent
22.07.1960 1147157 all checks consistent
23.07.1960 1243163 all checks consistent
24.07.1960 929119 all checks consistent
26.07.1960 931121 all checks consistent
27.07.1960 829109 all checks consistent
28.07.1960 840120 all checks consistent
29.07.1960 42767 all checks consistent
30.07.1960 644104 all checks consistent
01.08.1960 ——— reading could not be verified
02.08.1960 ——— reading could not be verified
03.08.1960 43575 all checks consistent
04.08.1960 4848 all checks consistent
05.08.1960 3737 all checks consistent
06.08.1960 2525 all checks consistent
07.08.1960 ——— reading could not be verified
08.08.1960 42161 all checks consistent
09.08.1960 41454 all checks consistent
10.08.1960 63292 all checks consistent
11.08.1960 1180190 all checks consistent
12.08.1960 986176 all checks consistent
13.08.1960 10136236 all checks consistent
14.08.1960 10132232 all checks consistent
15.08.1960 12148268 all checks consistent
16.08.1960 10205305 all checks consistent
17.08.1960 ——— reading could not be verified
18.08.1960 10182282 all checks consistent
19.08.1960 10156256 all checks consistent
20.08.1960 10141241 all checks consistent
21.08.1960 9113203 all checks consistent
23.08.1960 ——— reading could not be verified
24.08.1960 1052152 all checks consistent
25.08.1960 972162 all checks consistent
26.08.1960 772142 all checks consistent
27.08.1960 853133 all checks consistent
28.08.1960 830110 all checks consistent
29.08.1960 851131 all checks consistent
30.08.1960 ——— reading could not be verified
31.08.1960 652112 all checks consistent
01.09.1960 461101 all checks consistent
02.09.1960 658118 all checks consistent
03.09.1960 54292 all checks consistent
04.09.1960 43070 all checks consistent
05.09.1960 ——— reading could not be verified
06.09.1960 824104 all checks consistent
07.09.1960 953143 all checks consistent
08.09.1960 ——— reading could not be verified
09.09.1960 940130 all checks consistent
10.09.1960 1476216 all checks consistent
11.09.1960 953143 all checks consistent
15.09.1960 1042142 all checks consistent
16.09.1960 1054154 all checks consistent
17.09.1960 958148 all checks consistent
18.09.1960 1174184 all checks consistent
19.09.1960 1057157 all checks consistent
20.09.1960 ——— reading could not be verified
21.09.1960 1277197 all checks consistent
22.09.1960 ——— reading could not be verified
23.09.1960 ——— reading could not be verified
25.09.1960 14103243 all checks consistent
26.09.1960 1183193 all checks consistent
27.09.1960 ——— reading could not be verified
28.09.1960 953143 all checks consistent
29.09.1960 41353 all checks consistent
30.09.1960 2525 all checks consistent
01.10.1960 1313 all checks consistent
02.10.1960 3636 all checks consistent
03.10.1960 1515 all checks consistent
04.10.1960 51868 all checks consistent
05.10.1960 935125 all checks consistent
06.10.1960 751121 all checks consistent
07.10.1960 968158 all checks consistent
08.10.1960 1184194 all checks consistent
09.10.1960 1163173 all checks consistent
10.10.1960 1367197 all checks consistent
11.10.1960 1099199 all checks consistent
12.10.1960 752122 all checks consistent
13.10.1960 1155165 all checks consistent
14.10.1960 732102 all checks consistent
15.10.1960 952142 all checks consistent
16.10.1960 759129 all checks consistent
19.10.1960 862142 all checks consistent
20.10.1960 33868 all checks consistent
21.10.1960 ——— reading could not be verified
22.10.1960 44080 all checks consistent
24.10.1960 ——— reading could not be verified
25.10.1960 42363 all checks consistent
26.10.1960 62888 all checks consistent
27.10.1960 32454 all checks consistent
28.10.1960 22747 all checks consistent
29.10.1960 33262 all checks consistent
30.10.1960 34979 all checks consistent
31.10.1960 44787 all checks consistent
02.11.1960 1037137 all checks consistent
03.11.1960 62686 all checks consistent
04.11.1960 51868 all checks consistent
05.11.1960 927117 all checks consistent
06.11.1960 836116 all checks consistent
07.11.1960 858138 all checks consistent
08.11.1960 11110220 all checks consistent
09.11.1960 7101171 all checks consistent
10.11.1960 6113173 all checks consistent
12.11.1960 599149 all checks consistent
14.11.1960 492132 all checks consistent
15.11.1960 ——— reading could not be verified
17.11.1960 676136 all checks consistent
18.11.1960 63494 all checks consistent
19.11.1960 63898 all checks consistent
20.11.1960 571121 all checks consistent
21.11.1960 42666 all checks consistent
22.11.1960 54191 all checks consistent
23.11.1960 51969 all checks consistent
24.11.1960 5959 all checks consistent
26.11.1960 31444 all checks consistent
28.11.1960 32656 all checks consistent
29.11.1960 31545 all checks consistent
30.11.1960 43070 all checks consistent
01.12.1960 32454 all checks consistent
02.12.1960 758128 all checks consistent
03.12.1960 1049149 all checks consistent
04.12.1960 1162172 all checks consistent
05.12.1960 930120 all checks consistent
06.12.1960 ——— reading could not be verified
07.12.1960 931121 all checks consistent
08.12.1960 81494 all checks consistent
09.12.1960 ——— reading could not be verified
10.12.1960 945135 all checks consistent
12.12.1960 835115 all checks consistent
15.12.1960 961151 all checks consistent
16.12.1960 965155 all checks consistent
17.12.1960 52979 all checks consistent
18.12.1960 51868 all checks consistent
21.12.1960 44686 all checks consistent
22.12.1960 31444 all checks consistent
23.12.1960 3838 all checks consistent
24.12.1960 41151 all checks consistent
25.12.1960 922112 all checks consistent
26.12.1960 31444 all checks consistent
29.12.1960 657117 all checks consistent
30.12.1960 ——— reading could not be verified
31.12.1960 987177 all checks consistent

Click a date for the group table and the drawing. “—”: the reading of the sheet could not be verified, numbers are not shown; see the drawing.