Electrical Conductivity Structure in the South‐east Australian Region

Abstract

An array of variometers across south‐east Australia has recorded natural magnetic variations having power in a frequency band of 0.04—10 cycles/hr. The set data have outlined two major regions of high terrestrial electrical conductivity (s̀); the first beneath the sea floor off the Australian south‐east coast; the second in the vicinity of the most recent eruptive centres of the ‘Newer Volcanics’ in western Victoria. Both regions may indicate low Q upper mantle zones. Daily variation data provide significant control on permissible conductivity models. Copyright © 1974, Wiley Blackwell. All rights reserved