| 词条 | Solar cycle 12 |
| 释义 |
|cycle_num=12 |image=PSM V31 D507 The sun on september 1 1883.jpg |caption=Sunspots recorded during solar cycle 12 (1 September 1883). |start_date=December 1878 |end_date=March 1890 |duration=11.3 |max_count=124.4 |max_count_date=December 1883 |min_count=3.7 |spotless_count=736 |prev_name=Solar cycle 11 |next_name=Solar cycle 13 |prev_dates=1867-1878 |next_dates=1890-1902 }}Solar cycle 12 was the twelfth solar cycle since 1755, when extensive recording of solar sunspot activity began.[1][2] The solar cycle lasted 11.3 years, beginning in December 1878 and ending in March 1890. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 124.4 (December 1883), and the starting minimum was 3.7.[3] During the minimum transit from solar cycle 12 to 13, there were a total of 736 days with no sunspots.[4][5][6] History1882A very bright blood-red aurora display happened over New York on 16 April 1882, while significant communication disturbances occurred.[7] A geomagnetic storm later in that year produced the aurora of November 17, 1882. See also
References1. ^Kane, R.P. (2002). "Some Implications Using the Group Sunspot Number Reconstruction". Solar Physics 205(2), 383-401. {{Solar cycles}}{{Use dmy dates|date=October 2010}}{{DEFAULTSORT:Solar Cycle 12}}{{sun-stub}}2. ^{{cite web | title=The Sun: Did You Say the Sun Has Spots? | url=http://www.spacetoday.org/SolSys/Sun/Sunspots.html | publisher=Space Today Online | accessdate=12 August 2010}} 3. ^SIDC Monthly Smoothed Sunspot Number. " " 4. ^Spotless Days. " " 5. ^What's Wrong with the Sun? (Nothing) more information: Spotless Days. "{{cite web |url=https://science.nasa.gov/headlines/y2008/11jul_solarcycleupdate.htm |title=Archived copy |accessdate=2017-07-12 |deadurl=yes |archiveurl=https://web.archive.org/web/20080714032353/https://science.nasa.gov/headlines/y2008/11jul_solarcycleupdate.htm |archivedate=14 July 2008 |df=dmy-all }}" 6. ^Solaemon's Spotless Days Page. " " 7. ^http://www.solarstorms.org/SRefStorms.html 1 : Solar cycles |
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