The GOES XRS-B (1-8 Å) shown in a linear scaling (W/m²) with the black histogram. This information comes from the NOAA one-minute near-real-time data. Horizontal lines show [C, M, X] levels as [dots, dash-dots, dashs]. The solid vertical lines (green, gold, red) show times when FAI criteria reach approximate thresholds for eventual (C,M,X) flare occurrence, based on a 2-minute running difference. The blue dashed vertical at the right marks the end of data as restricted by the latency of the NOAA posting. The number at the top is the differential EM threshold, in units of 10⁴⁹ cm^-3 above 6 MK, for the lowest flag setting.

See further information here.