Australian Geomagnetism Report 2004 Summary

Introduction

During 2004 Geoscience Australia operated geomagnetic observatories at Kakadu and Alice Springs in the Northern Territory, Charters Towers in Queensland, Learmonth and Gnangara in Western Australia, Canberra in the Australian Capital Territory, Macquarie Island, Tasmania, in the sub-Antarctic, and Casey and Mawson in the Australian Antarctic Territory.

The absolute magnetometers in routine service at the Canberra Magnetic Observatory also served as the Australian references. The calibration of these instruments can be traced to International Standards. Absolute magnetometers at all the other Australian observatories were referenced against 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 the INTERMAGNET program. K indices, principal storms and rapid variations were scaled for the Canberra and Gnangara observatories, and provided regularly to the International Service of Geomagnetic Indices. K indices were also scaled for the Mawson observatory.

Seven repeat stations were re-occupied during a field survey within continental Australia during April and May in 2004.

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 2004.

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Download this report

• AGR 2004 (Volume 52): Download Part 1 [PDF: 3.5Mb]
• Preliminaries & Contents; Activities & Services; Data Distribution; Instrumentation; Observatory Summary; Kakadu Observatory; Charters Towers Observatory; Learmonth Observatory; Alice Springs Observatory; Gnangara Observatory.

• AGR 2004 (Volume 52): Download Part 2 [PDF: 4.4Mb]
• Preliminaries & Contents (repeated); Canberra Observatory; Macquarie Island Observatory; Casey (Antarctica) Observatory; Mawson (Antarctica) Observatory; Data Loss Summary; International Days; Repeat Station Network; References; Staff List.