GOES - X-ray flare-like events
             Daily summary
from 20130531 1958 to 20130601 0957  (YYYYMMDD hhmm UT)
 
   date     start-end time       class  log10(X)
(YYYYMMDD)     (hhmm UT)
    20130531    1958 - 1958          C    -5.0625
    20130531    1959 - 2000          M    -4.9788
    20130531    2001 - 2019          C    -5.0022
 
 
Used are solar X-ray fluxes measured by GOES 15 in the 1-8 Angstrom passband.