Historical solar cycles

The chart on this page shows the sunspot numbers since 1749. That's when the extensive recording of solar sunspot activity began. You can zoom in on this plot by selecting a time period that you wish to view. Every dataset can be toggled on or off by clicking on the corresponding description under each graph and it can be exported as a JPG, PNG, PDF or SVG file.

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48%

Space weather facts

Last X-flare2017/09/10X8.2
Last M-flare2020/05/29M1.1
Last geomagnetic storm2020/04/20Kp5 (G1)
Spotless days
Last 365 days316 days
2020125 days (80%)
Last spotless day2020/06/02

This day in history*

Solar flares
12000X2.3
22000X1.1
32000M7.1
42000M2.7
52012M2.1
ApG
1200626G1
2201623G1
3201323G1
4199418
5201217
*since 1994

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