Solar Flare Activity Level Description:

Solar flare activity is described according to the number of flares which occur during the day.
Activity level is divided into five grades:

0(Very Low) : X-ray events less than class C.

1(Low) : C-class X-ray events.

2(Moderate) : Isolated (1 to 4) M1-M4 X-ray events.

3(High) : Several (5 or more) M1-M4 X-ray events or isolated (1 to 4) M5-M9 X-ray events.

4(Very High) : Several (5 or more) M5-M9 X-ray events or X-class events.

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