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Solar cycle 10 was the tenth 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 11.3 years, beginning in December 1855 and ending in March 1867. The maximum smoothed sunspot number (monthly number of sunspots averaged over a twelve-month period) observed during the solar cycle was 98.0 (February 1860), and the minimum was 5.2.〔SIDC Monthly Smoothed Sunspot Number. "()"〕 There were a total of approximately 406 days with no sunspots during this cycle.〔Spotless Days. "()"〕〔What's Wrong with the Sun? (Nothing) more information: Spotless Days. "()"〕〔Solaemon's Spotless Days Page. "()"〕 The first observations of solar flares, by Richard Carrington and Richard Hodgson (independently), occurred during this cycle. ==Solar storm of 1859== (詳細はgeomagnetic storm on Earth occurred, known as the Carrington Event.〔〔("NASA — Severe Space Weather". )〕 Aurorae were seen around the world, even over the Caribbean; those over the Rocky Mountains were so bright that their glow awoke gold miners, who began preparing breakfast because they thought it was morning.〔("Timeline: The 1859 Solar Superstorm". )〕 Telegraph systems all over Europe and North America failed.〔("The Great Storm: Solar Tempest of 1859 Revealed". )〕 Telegraph pylons threw sparks and telegraph paper spontaneously caught fire. Some telegraph systems appeared to continue to send and receive messages despite having been disconnected from their power supplies. From August 28, 1859 until September 2, numerous sunspots and solar flares were observed on the sun. Just before noon on September 1, the British astronomer Richard Carrington observed the largest flare,〔("Bracing the Satellite Infrastructure for a Solar Superstorm". )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Solar cycle 10」の詳細全文を読む スポンサード リンク
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