A solar flare can be classified based on its intensity near Earth. Solar flares can disrupt radio communication, radar and other electromagnetic functions.
Measurement: X-rays in the 100-800 picometer range
Target: peak flux in watts per square meter
Designation:
(1) leading letter indicating power of 10
(2) following number
Power of 10
Class
< 10^(-7)
A
10^(-7)
B
10^(-6)
C
10^(-5)
M
10^(-4)
X
> 10^(-3)
Z
For classes B to M the following number ranges from 1 to 9.
For class X the number can be above 10
Intensity in watts per square meter =
= (number) * (power of 10 indicated by the class)
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