SHORT-PERIOD OSCILLATIONS IN THE EARTH'S ELECTROMAGNETIC FIELD.
Abstract
Short-period oscillations of the earth's electromagnetic field with periods of 1-500 sec are of two basic types: regular, almost-sinusoidal oscillations of a persistent nature, and irregular, erratic oscillations. Some regularities are established for changes in the period spectrum of these oscillations as a function of storm intensity. Short-period oscillations connected with bremsstrahlung from energetic electrons incident in the upper atmosphere are described. The mean regularity of excitation of the small-period oscillations is compared with regularities in the occurence of luminous atmospherics. It is found that (in the case of similar diurnal, annual and cyclic variations) small-period oscillations and F-scattering appeared simultaneously in only 40-50% of the cases at the middle latitudes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 06, 1967
- Accession Number
- AD0657164
Entities
People
- P. A. Vinogradov
Organizations
- Johns Hopkins University Applied Physics Laboratory