Fig. 2From: Statistical characteristics of medium-scale traveling ionospheric disturbances revealed from the Hokkaido East and Ekaterinburg HF radar dataDiurnal dependence of the MSTID azimuth occurrence rates for the entire period and for three seasons. Panels a–c correspond to the Hokkaido E region, Hokkaido F region, and Ekaterinburg F region. Red arrows with symbols N, E, S, and W indicate geographic North, East, South, and West, respectivelyBack to article page