Fig. 5From: Statistical characteristics of medium-scale traveling ionospheric disturbances revealed from the Hokkaido East and Ekaterinburg HF radar dataSample mode and FWHM of the MSTID horizontal phase velocity (a), period (b), horizontal wavelength (c), and relative amplitude (d) in each year of observations. Sample mode is shown by circles. Length of vertical bars indicates FWHM from its lower to upper bounds. Black and red curves correspond to the Hokkaido E and F regions, respectively. Green bars show the yearly mean sunspot numberBack to article page