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Swain Reefs (Townsville), QLD, 1969 (P368), magnetic line data, AWAGS levelled

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Created 14/01/2025

Updated 14/01/2025

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Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the Swain Reefs (Townsville), QLD, 1969 survey were acquired in 1969 by the QLD Government, and consisted of 18837 line-kilometres of data at 4000m line spacing and 150m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

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Title Swain Reefs (Townsville), QLD, 1969 (P368), magnetic line data, AWAGS levelled
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/925969a6-5fae-44d9-a9fd-cef947a92234
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 06/03/1969 - 19/03/1969
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au