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.

Comparing solar cycles

The chart below lets you compare several solar cycles with each other to see how the several solar cycles differ with each other and see how the current solar cycle progresses in relation to other solar cycles. The chart is shown with the current and last solar cycle, you can show/hide any solar cycle by clicking/tapping in the legend below the chart.

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Space weather facts

Last X-flare2024/06/10X1.55
Last M-flare2024/06/23M9.2
Last geomagnetic storm2024/06/15Kp5+ (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
May 2024171.7 +35.2
June 2024156.3 -15.4
Last 30 days150.6 +4.5

This day in history*

Solar flares
*since 1994

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