Sydney Chapman

Sydney Chapman - British mathematician and geophysicist (1888–1970). Article “Sydney Chapman” in Catalan Wikipedia has 31.4 points for quality (as of July 1, 2026). The article contains 12 references and 6 sections.

This article has the best quality in Chinese Wikipedia. However, the most popular language version of this article is English.

In June 2026 the article “Sydney Chapman” was edited by 2 authors in Catalan Wikipedia and written by 7 authors in all languages.

Since the creation of article “Sydney Chapman”, its content was written by 12 registered users of Catalan Wikipedia and edited by 379 registered Wikipedia users in all languages.

The article is cited 29 times in Catalan Wikipedia and cited 2496 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Catalan): #2682 in September 2011
• Global: #37680 in August 2010

The highest popularity rank from 2008:

• Local (Catalan): #54018 in January 2010
• Global: #501303 in June 2020

There are 23 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Chinese (zh) 西德尼·查普曼		47.7109
2	English (en) Sydney Chapman (mathematician)		44.972
3	Korean (ko) 시드니 채프먼		37.2165
4	Swedish (sv) Sydney Chapman (matematiker)		33.6159
5	French (fr) Sydney Chapman (1888-1970)		31.6285
6	Catalan (ca) Sydney Chapman		31.4097
7	Russian (ru) Чепмен, Сидни		31.3995
8	Norwegian (Nynorsk) (nn) Sydney Chapman		30.6313
9	Hungarian (hu) Sydney Chapman		29.7391
10	Slovenian (sl) Sydney Chapman (matematik)		27.6992

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Sydney Chapman" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Sydney Chapman (mathematician)		168 037
2	Japanese (ja) シドニー・チャップマン		21 099
3	Spanish (es) Sydney Chapman		20 051
4	German (de) Sydney Chapman		16 974
5	Russian (ru) Чепмен, Сидни		15 569
6	French (fr) Sydney Chapman (1888-1970)		15 341
7	Portuguese (pt) Sydney Chapman		12 401
8	Chinese (zh) 西德尼·查普曼		6 698
9	Italian (it) Sydney Chapman		5 542
10	Slovenian (sl) Sydney Chapman (matematik)		4 442

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Sydney Chapman" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Sydney Chapman (mathematician)		555
2	Chinese (zh) 西德尼·查普曼		104
3	Russian (ru) Чепмен, Сидни		72
4	Japanese (ja) シドニー・チャップマン		43
5	French (fr) Sydney Chapman (1888-1970)		33
6	German (de) Sydney Chapman		32
7	Spanish (es) Sydney Chapman		30
8	Catalan (ca) Sydney Chapman		20
9	Italian (it) Sydney Chapman		20
10	Swedish (sv) Sydney Chapman (matematiker)		19

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Sydney Chapman" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Sydney Chapman (mathematician)		95
2	French (fr) Sydney Chapman (1888-1970)		49
3	German (de) Sydney Chapman		48
4	Japanese (ja) シドニー・チャップマン		25
5	Spanish (es) Sydney Chapman		22
6	Italian (it) Sydney Chapman		18
7	Russian (ru) Чепмен, Сидни		17
8	Chinese (zh) 西德尼·查普曼		17
9	Dutch (nl) Sydney Chapman		14
10	Catalan (ca) Sydney Chapman		12

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The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Sydney Chapman" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Catalan (ca) Sydney Chapman		2
2	Korean (ko) 시드니 채프먼		2
3	Arabic (ar) سيدني تشابمان (رياضياتي)		1
4	English (en) Sydney Chapman (mathematician)		1
5	Persian (fa) سیدنی چپمن (ریاضیدان)		1
6	Bulgarian (bg) Сидни Чапман		0
7	Danish (da) Sydney Chapman (matematiker)		0
8	German (de) Sydney Chapman		0
9	Spanish (es) Sydney Chapman		0
10	French (fr) Sydney Chapman (1888-1970)		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Sydney Chapman" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	Portuguese (pt) Sydney Chapman		449
2	Slovenian (sl) Sydney Chapman (matematik)		433
3	Italian (it) Sydney Chapman		417
4	Chinese (zh) 西德尼·查普曼		389
5	English (en) Sydney Chapman (mathematician)		219
6	French (fr) Sydney Chapman (1888-1970)		105
7	Arabic (ar) سيدني تشابمان (رياضياتي)		68
8	German (de) Sydney Chapman		59
9	Persian (fa) سیدنی چپمن (ریاضیدان)		59
10	Swedish (sv) Sydney Chapman (matematiker)		52

More...

#	Language	Value
ar	Arabic سيدني تشابمان (رياضياتي)
bg	Bulgarian Сидни Чапман
ca	Catalan Sydney Chapman
da	Danish Sydney Chapman (matematiker)
de	German Sydney Chapman
en	English Sydney Chapman (mathematician)
es	Spanish Sydney Chapman
fa	Persian سیدنی چپمن (ریاضیدان)
fr	French Sydney Chapman (1888-1970)
hr	Croatian Sydney Chapman
hu	Hungarian Sydney Chapman
it	Italian Sydney Chapman
ja	Japanese シドニー・チャップマン
ko	Korean 시드니 채프먼
nl	Dutch Sydney Chapman
nn	Norwegian (Nynorsk) Sydney Chapman
no	Norwegian Sydney Chapman
pt	Portuguese Sydney Chapman
ro	Romanian Sydney Chapman (matematician)
ru	Russian Чепмен, Сидни
sl	Slovenian Sydney Chapman (matematik)
sv	Swedish Sydney Chapman (matematiker)
zh	Chinese 西德尼·查普曼

Best Rank

Catalan: #54018 01.2010

Global: #501303 06.2020

Best Rank

Catalan: #2682 09.2011

Global: #37680 08.2010

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information