Some Effects of Nuclear Explosions on the Ionosphere

Abstract

Examination of spread-F conditions at Brisbane and other stations adjacent to the Pacific area, together with an investigation of h'F2 and foF2 changes at the time, suggest that three disturbances propagated from the site of the nuclear explosion at Johnston I. on August 1, 1958. Somewhat similar variations of ionospheric parameters occurred after the explosion on the same site on August 12, 1958. The average speeds of these disturbances were 1666, 647, and 333 m/s.