The Coast Effect in the Variations of the Earth's Electromagnetic Field

Abstract

The coast effect [CE] means an influence of the boundary of two different by their electromagnetic characteristics, mediums-land and sea-on the alternative electromagnetic fields. Here are mentioned the properties of the coast effect for a wide range of variation periods from millimicrosecond up to the tenths of the minutes. The coast effect for the variations with the periods from the units of seconds to the tenths of minutes is divided in 2 types by the look of polarization of the primary field as to the coast CE-1 and CE-2. Here are given experimental data by CE-1 for the area of the stations Mirny (Antarctida) and CE-2 for the station Alushta (coast of the Black Sea).

Coastal effects in magnetic and telluric current variations near a complex land, shelving seawater boundary

“…Ten km offshore the direction is similar, but the amplitude is about x/• that near shore. Rokityanskii [1963] has analyzed the results obtained at Mirny and also data from several other coastal sites. He points out two special cases in theory:…”