Plasma waves in the frequency range 0.001 ? 10 cps in the earth's magnetosphere and ionosphere

Abstract

The plasma model for the magnetosphere and ionosphere is first discussed. A review of some parts of the theory for a warm collisionless plasma of interest in the magnetosphere in connection with waves of periods between 0.1 and 1000 seconds is given. The theory for magnetohydrodynamic waves in a slightly ionized gas is then summarized. The available observational data about magnetospheric and ionospheric phenomena, which may be interpreted in terms of waves with periods between 0.1 and 1000 seconds, are briefly surveyed and some theoretical applications to the ionosphere and magnetosphere are finally discussed. The theory of shock phenomena and transients in the magnetosphere is not included in the report.

Amplitude variation of Pc 5 pulsations at high latitudes

“…The• variety of criteria adopted by different workers makes the comparison of results difficult. Summaries of the earlier work on Pc 5 are given by Ol' [1963], Hultqvist [1966], Troitskaya [1967], Campbell [1967], Saito [1969], Jacobs [1970], Samson [1971] and Orr [1973].…”

Call for Papers

“…The characteristics of PCA events have up to now mainly been investigated by the use of riometers (e.g., Reid 1961;Hultqvist, 1966). PCA's are caused by high energy protons and in some cases also by a· particles.…”

Pc 4 and Pc 5 pulsations during storm recovery

“…Continuous quasi-sinusoidal micropulsations of period 45-150 and 150-600 s are classified as continuous pulsations Pc 4 and Pc 5, respectively. The general characteristics of these pulsations have been reviewed by several authors [Hultqvist, 1966;Troitskaya and Gul'elmi, 1967;Campbell, 1967;Saito, 1969;Gendrin, 1970;Jacobs, 1970;Dungey and Southwoo& 1970;Orr, 1973]. Intensive studies of individual events have recently been carried out by using closely spaced latitudinal chains [Samson et al, 1971;Fukunishi and Lanzerotti, 1974] and a longitudinal chain of ground stations [Gupta et al, 1971].…”