Australian Geomagnetism Report 1999 Summary

Introduction

During 1999 the Australian Geological Survey Organisation (now Geoscience Australia) operated geomagnetic observatories at Alice Springs and Kakadu in the Northern Territory, Canberra in the Australian Capital Territory, Charters Towers in Queensland, Gnangara and Learmonth in Western Australia, Macquarie Island, Tasmania, in the sub-Antarctic, and Mawson in the Australian Antarctic Territory. Magnetic recording also took place at the stations of Casey and Davis in the Australian Antarctic Territory.

The absolute magnetometers in routine service at the Canberra Magnetic Observatory also served as the Australian standards. The calibration of these instruments can be traced to International Standards. Absolute magnetometers at all the other Australian observatories are standardised relative to those at Canberra.

Magnetic mean value data were provided to the World Data Centres for Geomagnetism at Boulder, USA and at Copenhagen, Denmark, as well as to INTERMAGNET. K indices, principal storms and rapid variations were hand-scaled for the Canberra and Gnangara observatories, and provided regularly to the International Service of Geomagnetic Indices. K indices were digitally scaled at the Mawson observatory.

Seven repeat stations were re-occupied in 1999 during field surveys on continental Australia in the first half of the year.

This report describes instrumentation and activities, and presents monthly and annual mean magnetic values, plots of hourly mean magnetic values and K indices at the magnetic observatories and repeat stations operated by Geoscience Australia during calendar year 1999.

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Download this report

• AGR 1999 (Volume 47): Download Part 1 [PDF_3.4Mb]
• Preliminaries & Contents ; Activities & Services ; Data Distribution ; Instrumentation ; Observatory Summary ; Alice Springs Observatory ; Canberra Observatory ; Charters Towers Observatory ; Gnangara Observatory ; Kakadu Observatory

• AGR 1999 (Volume 47): Download Part 2 [PDF_3.6Mb]
• Preliminaries & Contents (repeat) ; Learmonth Observatory ; Macquarie Island Observatory ; Mawson (Antarctica) Observatory ; Casey (Antarctica) Observatory ; Davis (Antarctica) Observatory ; Data Loss Summary ; International Days ; Repeat Station Network ; References ; Staff List