Comprehensive Mapping of Australia's Geomagnetic Variations

Authors


Abstract

Australian scientists have undertaken a magnetometer array study that will map in detail, for the first time, the natural fluctuations of the geomagnetic field over an entire continent. On November 18, 1989, 57 stations comprising the Australia-Wide Array of Geomagnetic Stations (AWAGS) began recording the geomagnetic variation field across Australia at 1-minute intervals (Figure 1). The full array operated for 8 months, and instruments along a north-south line from Darwin through Alice Springs to Adelaide were kept operating for 12 months. Most of the magnetometers were sited near magnetic repeat stations, where absolute measurements were made of the field to correct for any magnetometer drift.