Effect of the U.S. High-altitude Nuclear Explosion on Radio Wave Propagation

A high-altitude nuclear explosion, called Starfish, over Johnston Island on July 9, 1962, produced a distinct geomagnetic effect at stations all over the world. This effect consisted of two major parts: initial rapid oscillations followed by slower changes. The rapid oscillations began within several seconds after the shot, and were caused by the propagation of ELF (extremely-low-frequency electromagnetic waves) and hydromagnetic waves. The slower changes reached a maximum a few minutes after the shot and lasted about half an hour. The worldwide pattern of these slow changes indicates that they were due not to a single effect but to a superposition of different effects. A quantitative estimation is made of these slow changes, taking into consideration ionospheric variations, and the results of these estimations are compared with the observed changes.

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On the geomagnetic effect of the Starfish high-altitude nuclear explosion

Maeda¹,

Shirgaokar²,

Yasuhara³

et al. 1964

J. Geophys. Res.

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Effect of the U.S. High-altitude Nuclear Explosion on Radio Wave Propagation

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On the geomagnetic effect of the Starfish high-altitude nuclear explosion

On the geomagnetic effect of the Starfish high-altitude nuclear explosion

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