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Solar cycle 11 : ウィキペディア英語版
Solar cycle 11

Solar cycle 11 was the eleventh solar cycle since 1755, when extensive recording of solar sunspot activity began.〔Kane, R.P. (2002). "(Some Implications Using the Group Sunspot Number Reconstruction )". ''Solar Physics'' 205(2), 383-401.〕〔(【引用サイトリンク】 url=http://www.spacetoday.org/SolSys/Sun/Sunspots.html )〕 The solar cycle lasted 11.8 years, beginning in March 1867 and ending in December 1878. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 140.3 (August 1870), and the minimum was 2.2.〔SIDC Monthly Smoothed Sunspot Number. "()"〕 There were a total of approximately 1028 days with no sunspots during this cycle (the highest recorded of any cycle to date).〔Spotless Days. "()"〕〔What's Wrong with the Sun? (Nothing) more information: Spotless Days. "()"〕〔Solaemon's Spotless Days Page. "()"〕
Strong auroral displays were observed in October 1870, February 1872, and August 1872.〔http://www.solarstorms.org/SRefStorms.html〕
==See also==

*Solar variation
*List of solar cycles

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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