The Coast Effect in Geomagnetic Variations in South Australia
1978 年 30 巻 2 号 p. 109-120
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1978 年 30 巻 2 号 p. 109-120
A profile of seven magnetometers, extending from a sea floor magnetometer at the edge of the continental shelf to one situated 300km inland, recorded geomagnetic variations during November/December 1976. The observations show a particularly uncomplicated coast effect variation. When the in-phase amplitude of the transfer function at 1 cycle per hour is plotted against distance from the continent edge it shows a striking resemblance to the results obtained on the south-east Australian coast by BENNETT and LILLEY (1971). This demonstrates that the hypothesis that the coast effect “signature” depends on the geological history of the continental material is a valid one. It encourages us to try to reproduce EVERETT and HYNDMAN'S (1967) “shield” curve with a profile of magnetometers across a shield area on the west coast of South Australia.
