The Sun activity increases during every ...

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11 years
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1300 years
Solar cycles have an average duration of about 11 years. The periodic changes in the Sun's activity include changes of the levels of solar radiation and the number and size of sunspots.
Katarzyna Dąbrowska
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5 years
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flagAustria
15%
77%
2%
5%
40
flagFrance
5%
77%
11%
5%
18
flagGreece
16%
66%
5%
11%
18
flagSwitzerland
0%
58%
29%
11%
17
flagCanada
16%
55%
16%
11%
18
flagthe Netherlands
9%
54%
27%
9%
11
flagPakistan
13%
52%
21%
13%
23
flagthe United Kingdom
11%
50%
15%
20%
101
flagRepublic of Ireland
20%
50%
20%
10%
10
flagGermany
16%
49%
18%
15%
202
flagthe United States
12%
47%
20%
18%
185
flagAustralia
7%
47%
13%
26%
38
flagIndia
18%
44%
13%
22%
314
flagthe United Arab Emirates
21%
42%
7%
28%
14
flagPoland
12%
41%
19%
26%
7301
flagthe Philippines
17%
35%
21%
25%
28
flagUnknown
18%
31%
31%
18%
16