GOES - X-ray flare-like events
             Daily summary
from 20130427 1957 to 20130428 1012  (YYYYMMDD hhmm UT)
 
   date     start-end time       class  log10(X)
(YYYYMMDD)     (hhmm UT)
    20130427    2312 - 2326          C    -5.9586
    20130428    0556 - 0701          C    -5.6737
    20130428    0704 - 0704          C    -6
    20130428    0706 - 0742          C    -5.8069
 
 
Used are solar X-ray fluxes measured by GOES 15 in the 1-8 Angstrom passband.