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Round-the-World Sound Waves produced by the Nuclear Explosion on October 30, 1961, and their Effect on the Ionosphere at Sodankylä

Naturevolume 192pages11731174 (1961) | Download Citation



THE heavy nuclear explosion on October 30, 1961, at 8.33.33 G.M.T. at a distance of 1,160 km. in Novaya Zemlya (presumably at tropospheric heights) was recorded at Sodankylä by means of a seismograph, a microbarograph, a magnetograph, and a vertical incidence ionosonde. The deflexion of the microbarograph took place at 9.42 G.M.T. with an amplitude of about ± 1 mb. The ionosonde showed a sudden, heavy disturbance in the E and F regions at 9 G.M.T., that is, 42 min. before the deflexion of the microbarograph (Fig. 1).

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  1. 1

    Mitra, S. K., The Upper Atmosphere, second ed., 51 (Asiatic Soc., Calcutta, 1952).

  2. 2

    Newell, jun., H. E., in Physics of the Upper Atmosphere, edit. by Ratcliffe, J. A., 83 (Academic Press, New York and London, 1960).

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  1. Max-Planck-Institut für Aeronomie, Lindau/Harz, Germany

    • G. ROSE
  2. Geophysical Observatory, Sodankylä, Finland

    • J. OKSMAN
    •  & E. KATAJA


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