Solar cycle 15
Solar cycle 15 was the fifteenth solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 10.1 years, beginning in July 1913 and ending in August 1923. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 175.7 (August 1917), and the starting minimum was 2.5. During the minimum transit from solar cycle 15 to 16, there were a total of 534 days with no sunspots.
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Solar cycle 15
Solar cycle 15 was the fifteenth solar cycle since 1755, when extensive recording of solar sunspot activity began. The solar cycle lasted 10.1 years, beginning in July 1913 and ending in August 1923. The maximum smoothed sunspot number (SIDC formula) observed during the solar cycle was 175.7 (August 1917), and the starting minimum was 2.5. During the minimum transit from solar cycle 15 to 16, there were a total of 534 days with no sunspots.
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Le cycle solaire 15 est le qui ...... 1913 et s'est achevé en 1923.
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Solar cycle 15 was the fifteen ...... of 534 days with no sunspots.
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第15太陽周期(Solar cycle 15)は、1755年 ...... ニア州では通信障害が起こった他、天頂にオーロラが観測された。
@ja
第15太陽週期是從1755年開始紀錄太陽黑子以來的第15個太 ...... ,最小的數值為5.6,在這個週期內總共約有534天沒有黑子。
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Sunspots recorded during solar cycle 15 .
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August 1923
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August 1917
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July 1913
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Le cycle solaire 15 est le qui ...... 1913 et s'est achevé en 1923.
@fr
Solar cycle 15 was the fifteen ...... of 534 days with no sunspots.
@en
第15太陽周期(Solar cycle 15)は、1755年 ...... ニア州では通信障害が起こった他、天頂にオーロラが観測された。
@ja
第15太陽週期是從1755年開始紀錄太陽黑子以來的第15個太 ...... ,最小的數值為5.6,在這個週期內總共約有534天沒有黑子。
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Cycle solaire 15
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Solar cycle 15
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第15太陽周期
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第15太陽週期
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