Geophysical Effects Associated with High-Altitude Explosions

Abstract

Information is presented on some geophysical effects which one would expect to be associated with highaltitude nuclear or chemical explosions. Discussions are included on: the Johnston Island nuclear explosion which was observed in some detail, geophysically, from the Apia Magnetic Observatory; the high-altiiude grenade shot at Woomera, Australia, which also seemed to be accompanied by geophysical effects; and the effects which accompany the release of trapped Van Allen particles, as well as effects expected to be associated with the release of additional particles from a nuclear explosion. (J.H.M.)