Istanbul University Faculty of Science

SOLAR OBSERVATIONS

Istanbul University Observatory · Sunspot observations since 1950

Observatory

Salih Karaali Observer record

← All observers
SK
Staff
548
Observation days
15
Years with observations
36.5
Mean days / year
163
Best year (1964)
09.04.1961
25.07.1978
First / last observation

1961 25 days

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Apr 4
May 6
Jun 9
Jul 2
Nov 3
Dec 1

1962 25 days

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Jan 3
Feb 1
Mar 5
Apr 2
May 4
Jun 4
Jul 5
Aug 1

1963 51 days

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Oct 19
Nov 20
Dec 12

1964 163 days

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Jan 14
Feb 8
Mar 10
Apr 19
May 18
Jun 19
Jul 5
Aug 15
Sep 17
Oct 22
Nov 9
Dec 7

1965 75 days

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Jan 6
Feb 7
Mar 7
Apr 7
May 12
Jun 12
Jul 6
Oct 4
Nov 7
Dec 7

1966 56 days

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Jan 4
Feb 5
Mar 6
Apr 5
May 1
Jun 8
Jul 8
Aug 4
Sep 6
Nov 5
Dec 4

1967 34 days

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Jan 2
Feb 6
Mar 3
Apr 9
May 9
Jul 2
Aug 3

1969 19 days

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Jun 4
Jul 3
Sep 4
Oct 4
Nov 3
Dec 1

1970 19 days

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Jan 3
Mar 2
Apr 5
May 3
Jun 1
Jul 3
Aug 1
Sep 1

1971 14 days

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Feb 2
Mar 1
Apr 1
May 2
Jun 1
Jul 1
Oct 1
Nov 3
Dec 2

1972 10 days

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Jan 1
Apr 1
May 1
Jul 3
Aug 4

1973 19 days

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Mar 4
Apr 2
May 5
Jun 4
Jul 4

1974 12 days

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Apr 1
Jul 2
Aug 1
Sep 2
Oct 4
Nov 2

1975 25 days

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Apr 1
May 4
Aug 7
Sep 9
Oct 4

1978 1 days

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Jul 1