World-Wide Characteristics of Geomagnetic Micropulsations

Abstract

A detailed investigation is carried out on geomagnetic micropulsations recorded by rapid-run magnetograms during the International Geophysical Year from 17 observatories as widely distributed geographically as possible. A number of well-defined cases (14 Pt's and 3 Pc's ) are investigated in detail. Diurnal and world-wide characteristics are derived and the equivalent overhead current systems which may give rise to the micropulsations are constructed.