Ionospheric Disturbances in the.F2 Region Associated with Severe Thunderstorms

Abstract

Radio observations are reported at two locations during June 1969, one near Concordia, Kan., and the other near Oklahoma City. It is found that ionospheric waves are observed when thunderstorms with tops (radar height) greater than 40,000 ft are occurring within a radius of 200 km. The waves have periods in the range of 1 min to about 5 min and are detected as a Doppler shift in the ionospheric radio echoes. Spectrum analysis of the storms indicated that, in general, there are two peaks of infrasonic power which occur at periods of 3.6 and 4.5 min.