RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 12, ES5001, doi:10.2205/2012ES000520, 2012

Table 1. Classification of Flares According to the Flux Quantity of $X$-Ray Radiation in the Range 0.1-0.8 nm
Flare class Flux in the maximum, mW m$^{-2}$ Relative frequency, %
C1-C9 1-9 67.7
M1-M9 10-90 29.3
X1-X9 100-900 3

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Citation: Nusinov A. A., V. V. Katyushina (2012), Classification of solar X-ray flares on X-ray measurements on board geostationary satellites ``Elektro'', Russ. J. Earth Sci., 12, ES5001, doi:10.2205/2012ES000520.
 

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