GOES - X-ray flare-like events
             Daily summary
from 20130720 1957 to 20130721 1012  (YYYYMMDD hhmm UT)
 
   date     start-end time       class  log10(X)
(YYYYMMDD)     (hhmm UT)
    20130720    2338 - 2338          C    -5.9914
    20130721    0308 - 0308          C    -5.9957
    20130721    0829 - 1007          C    -5.5045
 
 
Used are solar X-ray fluxes measured by GOES 15 in the 1-8 Angstrom passband.