NOAA / Space Weather Prediction Center
These plots show the annual trend, from 1986 to 2013, of various verification metrics for X flare forecasts with lead times of one to three days. The top panel plots the number of days on which an X flare occurred during the year (event climatology), the second panel plots the mean error (or bias) of the forecasts, the third panel shows the mean square error of the forecasts, and the bottom panel displays the linear association (correlation) between the forecasts and observations.
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