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 1978 271 sheets · 239 usable · mean R 130.3

DrawingDategfRReading
03.01.1978 1070170 all checks consistent
04.01.1978 1176186 all checks consistent
11.01.1978 2929 all checks consistent
12.01.1978 32454 all checks consistent
13.01.1978 32656 all checks consistent
14.01.1978 52979 all checks consistent
16.01.1978 2727 all checks consistent
17.01.1978 21434 all checks consistent
25.01.1978 32656 all checks consistent
27.01.1978 44787 all checks consistent
29.01.1978 865145 all checks consistent
30.01.1978 752122 all checks consistent
31.01.1978 9104194 all checks consistent
02.02.1978 868148 all checks consistent
08.02.1978 ——— reading could not be verified
10.02.1978 678138 all checks consistent
12.02.1978 773143 all checks consistent
17.02.1978 43474 all checks consistent
18.02.1978 53787 all checks consistent
21.02.1978 52777 all checks consistent
22.02.1978 52474 all checks consistent
24.02.1978 955145 all checks consistent
25.02.1978 ——— reading could not be verified
26.02.1978 972162 all checks consistent
27.02.1978 764134 all checks consistent
28.02.1978 954144 counts consistent, some coordinates doubtful
02.03.1978 951141 all checks consistent
03.03.1978 72191 all checks consistent
06.03.1978 63797 all checks consistent
07.03.1978 648108 all checks consistent
10.03.1978 867147 all checks consistent
12.03.1978 63191 all checks consistent
13.03.1978 659119 all checks consistent
14.03.1978 53888 all checks consistent
15.03.1978 643103 all checks consistent
16.03.1978 63999 all checks consistent
17.03.1978 63595 all checks consistent
18.03.1978 63696 all checks consistent
19.03.1978 ——— reading could not be verified
20.03.1978 42262 all checks consistent
21.03.1978 644104 all checks consistent
24.03.1978 1025125 all checks consistent
26.03.1978 72898 all checks consistent
27.03.1978 52272 all checks consistent
28.03.1978 21838 all checks consistent
29.03.1978 51464 all checks consistent
31.03.1978 924114 all checks consistent
01.04.1978 832112 all checks consistent
02.04.1978 834114 all checks consistent
03.04.1978 731101 all checks consistent
06.04.1978 850130 all checks consistent
08.04.1978 744114 all checks consistent
10.04.1978 1180190 all checks consistent
11.04.1978 991181 all checks consistent
12.04.1978 977167 all checks consistent
13.04.1978 11116226 all checks consistent
15.04.1978 967157 all checks consistent
16.04.1978 1092192 all checks consistent
17.04.1978 1047147 counts consistent, some coordinates doubtful
18.04.1978 1050150 all checks consistent
20.04.1978 950140 all checks consistent
21.04.1978 859139 all checks consistent
24.04.1978 875155 all checks consistent
25.04.1978 1194204 counts consistent, some coordinates doubtful
26.04.1978 759129 all checks consistent
27.04.1978 681141 all checks consistent
28.04.1978 660120 all checks consistent
02.05.1978 475115 all checks consistent
03.05.1978 6122182 all checks consistent
04.05.1978 5114164 all checks consistent
05.05.1978 6108168 all checks consistent
08.05.1978 ——— reading could not be verified
09.05.1978 736106 all checks consistent
10.05.1978 837117 all checks consistent
11.05.1978 736106 all checks consistent
13.05.1978 837117 counts consistent, some coordinates doubtful
14.05.1978 684144 all checks consistent
15.05.1978 835115 counts consistent, some coordinates doubtful
17.05.1978 578128 all checks consistent
18.05.1978 882162 all checks consistent
19.05.1978 ——— reading could not be verified
20.05.1978 847127 all checks consistent
21.05.1978 937127 all checks consistent
22.05.1978 746116 all checks consistent
23.05.1978 ——— reading could not be verified
24.05.1978 845125 all checks consistent
25.05.1978 894174 all checks consistent
26.05.1978 668128 all checks consistent
27.05.1978 685145 all checks consistent
28.05.1978 5121171 all checks consistent
29.05.1978 8101181 all checks consistent
30.05.1978 881161 all checks consistent
31.05.1978 ——— reading could not be verified
01.06.1978 1098198 all checks consistent
02.06.1978 773143 all checks consistent
03.06.1978 950140 all checks consistent
04.06.1978 63292 all checks consistent
05.06.1978 43777 all checks consistent
06.06.1978 32454 all checks consistent
07.06.1978 41252 all checks consistent
08.06.1978 51969 all checks consistent
09.06.1978 4949 all checks consistent
10.06.1978 2828 all checks consistent
11.06.1978 42464 all checks consistent
12.06.1978 ——— reading could not be verified
13.06.1978 62585 counts consistent, some coordinates doubtful
14.06.1978 842122 all checks consistent
15.06.1978 831111 all checks consistent
16.06.1978 950140 all checks consistent
17.06.1978 748118 all checks consistent
18.06.1978 1159169 all checks consistent
19.06.1978 1292212 all checks consistent
20.06.1978 1371201 all checks consistent
21.06.1978 ——— reading could not be verified
22.06.1978 13121251 all checks consistent
23.06.1978 ——— reading could not be verified
24.06.1978 11106216 all checks consistent
25.06.1978 ——— reading could not be verified
26.06.1978 11147257 counts consistent, some coordinates doubtful
27.06.1978 ——— reading could not be verified
28.06.1978 7171241 all checks consistent
29.06.1978 699159 all checks consistent
30.06.1978 970160 all checks consistent
01.07.1978 737107 counts consistent, some coordinates doubtful
02.07.1978 52777 all checks consistent
03.07.1978 52171 all checks consistent
04.07.1978 42565 counts consistent, some coordinates doubtful
05.07.1978 550100 all checks consistent
06.07.1978 34373 all checks consistent
07.07.1978 836116 all checks consistent
08.07.1978 853133 all checks consistent
09.07.1978 749119 all checks consistent
10.07.1978 854134 all checks consistent
11.07.1978 ——— reading could not be verified
12.07.1978 793163 all checks consistent
13.07.1978 793163 all checks consistent
14.07.1978 ——— reading could not be verified
15.07.1978 672132 all checks consistent
16.07.1978 ——— reading could not be verified
17.07.1978 661121 all checks consistent
18.07.1978 838118 all checks consistent
19.07.1978 1237157 all checks consistent
20.07.1978 63797 all checks consistent
21.07.1978 935125 all checks consistent
22.07.1978 41050 all checks consistent
23.07.1978 42262 all checks consistent
24.07.1978 4747 all checks consistent
25.07.1978 2626 all checks consistent
26.07.1978 2323 all checks consistent
27.07.1978 31949 all checks consistent
28.07.1978 41050 all checks consistent
29.07.1978 51161 all checks consistent
30.07.1978 41656 all checks consistent
31.07.1978 31343 all checks consistent
01.08.1978 32454 counts consistent, some coordinates doubtful
02.08.1978 829109 all checks consistent
03.08.1978 42262 all checks consistent
04.08.1978 62686 all checks consistent
05.08.1978 72595 all checks consistent
06.08.1978 63494 all checks consistent
07.08.1978 43070 all checks consistent
08.08.1978 468108 all checks consistent
09.08.1978 778148 all checks consistent
10.08.1978 5103153 all checks consistent
11.08.1978 45595 all checks consistent
12.08.1978 754124 all checks consistent
13.08.1978 764134 all checks consistent
14.08.1978 957147 all checks consistent
15.08.1978 62484 all checks consistent
16.08.1978 31545 all checks consistent
17.08.1978 33363 all checks consistent
18.08.1978 53787 all checks consistent
19.08.1978 41959 all checks consistent
20.08.1978 ——— reading could not be verified
21.08.1978 21030 all checks consistent
22.08.1978 31141 all checks consistent
23.08.1978 51969 all checks consistent
24.08.1978 41858 counts consistent, some coordinates doubtful
25.08.1978 62686 all checks consistent
26.08.1978 41252 all checks consistent
27.08.1978 62989 all checks consistent
28.08.1978 42767 all checks consistent
29.08.1978 52676 all checks consistent
30.08.1978 62484 all checks consistent
31.08.1978 1070170 all checks consistent
01.09.1978 8133213 all checks consistent
02.09.1978 11100210 counts consistent, some coordinates doubtful
03.09.1978 10127227 all checks consistent
07.09.1978 799169 all checks consistent
08.09.1978 575125 all checks consistent
11.09.1978 646106 all checks consistent
13.09.1978 ——— reading could not be verified
14.09.1978 736106 all checks consistent
15.09.1978 ——— reading could not be verified
17.09.1978 1083183 all checks consistent
18.09.1978 1361191 all checks consistent
19.09.1978 ——— reading could not be verified
20.09.1978 ——— reading could not be verified
23.09.1978 12109229 all checks consistent
24.09.1978 13116246 counts consistent, some coordinates doubtful
25.09.1978 1585235 all checks consistent
26.09.1978 1795265 counts consistent, some coordinates doubtful
27.09.1978 1456196 all checks consistent
28.09.1978 1352182 counts consistent, some coordinates doubtful
29.09.1978 ——— reading could not be verified
30.09.1978 1087187 counts consistent, some coordinates doubtful
01.10.1978 ——— reading could not be verified
02.10.1978 1555205 all checks consistent
03.10.1978 1352182 all checks consistent
04.10.1978 1139149 counts consistent, some coordinates doubtful
06.10.1978 ——— reading could not be verified
07.10.1978 656116 counts consistent, some coordinates doubtful
08.10.1978 1055155 all checks consistent
09.10.1978 950140 all checks consistent
10.10.1978 13107237 all checks consistent
11.10.1978 1477217 all checks consistent
12.10.1978 17102272 counts consistent, some coordinates doubtful
13.10.1978 11112222 counts consistent, some coordinates doubtful
14.10.1978 16151311 all checks consistent
15.10.1978 ——— reading could not be verified
16.10.1978 1592242 all checks consistent
17.10.1978 ——— reading could not be verified
18.10.1978 1248168 all checks consistent
19.10.1978 12135255 all checks consistent
20.10.1978 12120240 counts consistent, some coordinates doubtful
21.10.1978 11121231 all checks consistent
23.10.1978 1160170 counts consistent, some coordinates doubtful
24.10.1978 952142 all checks consistent
31.10.1978 1268188 counts consistent, some coordinates doubtful
01.11.1978 825105 all checks consistent
02.11.1978 1187197 counts consistent, some coordinates doubtful
04.11.1978 14118258 all checks consistent
05.11.1978 1371201 all checks consistent
07.11.1978 668128 all checks consistent
08.11.1978 839119 all checks consistent
09.11.1978 782152 all checks consistent
12.11.1978 945135 all checks consistent
14.11.1978 739109 all checks consistent
15.11.1978 ——— reading could not be verified
16.11.1978 61777 all checks consistent
17.11.1978 843123 all checks consistent
18.11.1978 743113 all checks consistent
19.11.1978 941131 counts consistent, some coordinates doubtful
20.11.1978 ——— reading could not be verified
21.11.1978 62484 all checks consistent
22.11.1978 41050 all checks consistent
23.11.1978 31343 all checks consistent
24.11.1978 3737 all checks consistent
25.11.1978 830110 all checks consistent
26.11.1978 1025125 all checks consistent
27.11.1978 1036136 all checks consistent
01.12.1978 62585 all checks consistent
02.12.1978 ——— reading could not be verified
04.12.1978 1188198 all checks consistent
09.12.1978 ——— reading could not be verified
11.12.1978 ——— reading could not be verified
12.12.1978 9248338 counts consistent, some coordinates doubtful
13.12.1978 10122222 all checks consistent
14.12.1978 986176 all checks consistent
16.12.1978 8150230 all checks consistent
17.12.1978 991181 counts consistent, some coordinates doubtful
20.12.1978 938128 counts consistent, some coordinates doubtful
21.12.1978 62181 all checks consistent
23.12.1978 ——— reading could not be verified
24.12.1978 2525 all checks consistent
26.12.1978 951141 all checks consistent
27.12.1978 1076176 all checks consistent
28.12.1978 1172182 all checks consistent
29.12.1978 ——— reading could not be verified
30.12.1978 884164 all checks consistent
31.12.1978 12163283 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.