Solar Cycle progression

These charts on this page resemble the progress of the solar cycle. The charts are updated every month by the SWPC with the latest ISES predictions. Observed values are initially temporary values that are replaced with the final data once it is available. All the graphs on this page can be exported as JPG, PNG, PDF or SVG files. Every dataset can be toggled on or off by clicking on the corresponding description under each graph.

Number of C, M and X-class solar flares per year

The graph below shows us the number of C, M and X-class solar flares that occur for any given year. It gives us a nice idea of the amount of solar flares in relation to the sunspot number. It is thus another way of seeing how a solar cycle evolved over time. This data comes from the NOAA SWPC and is updated daily.

The graph below shows you the number of C, M and X-class solar flares that were produced during past month together with the sunspot number of each day. This gives you an idea of the solar activity during the past month. This data comes from the NOAA SWPC and is updated daily.

Number of spotless days per year

During periods of low solar activity, the Sun can be devoid of any sunspots and thus be spotless. This is a frequent occurrence in the years around and during solar minimum. The graph below shows how many days during a specific year that the earth-facing side of the Sun had no sunspots.

Number of days with a geomagnetic storm per year

The graph below shows the number of days with a geomagnetic storm per year and how strong those storms were. This will give you an idea in which years there were a lot of geomagnetic storms.

Current data suggest that it is not possible to see aurora now at middle latitudes
Active geomagnetic conditions expected
The solar wind speed is currently moderately high (687.7 km/sec.)

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 25% 65%
Middle latitude 25% 1%
Predicted Kp max 5
Solar activity
M-class solar flare 1%
X-class solar flare 1%
Moon phase
Waning Crescent


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Space weather facts

Last X-flare:2015/05/05X2.7
Last M-flare:2017/04/03M5.8
Last geomagnetic storm:2017/04/23Kp6 (G2)
Number of spotless days in 2017:30
Last spotless day:2017/04/17

This day in history*

Solar flares
*since 1994