Fig. 7
From: Statistical analysis of short-wave fadeout for extreme space weather event estimation
Complementary cumulative distribution function of SWF duration from ionosonde observation (pluses, diamonds, or asterisk marks) and fitting functions (solid lines) for SWFs with the criteria of dfmin ≥ 2.5 MHz (blue), dfmin ≥ 3.5 MHz (light blue), and complete blackout (red)