September 2007

12 September 2007

New airborne geophysical data to aid salinity management

Airborne geophysical survey data from Billabong Creek in New South Wales and Honeysuckle Creek in Victoria have been incorporated into the National Airborne Geophysical Database.

Survey locality diagram – Honeysuckle Creek (Copyright Geoscience Australia 2007)

The data, released on Tuesday 11th September, was gathered through a pilot project designed to test the relevance of airborne geophysical data for mapping the distribution of salt-affected land and sub-surface salt. The aim of the project was to map the sub-surface geology to aid in the mapping of groundwater movement and subsequent salt mobilisation.

The project, funded by the Murray Darling Basin Commission, was developed from the National Geophysics Project originally sponsored under the National Dryland Salinity Program.

Two surveys were conducted to collect airborne electromagnetic data with separate surveys conducted to collect airborne magnetic & radiometric data.

The magnetic and radiometric surveys collected 30,862 and 13,770 line kilometres of data for Billabong Creek and Honeysuckle Creek respectively. The electromagnetic surveys collected 5,522 and 6,082 line kilometres of data for Billabong Creek and Honeysuckle Creek respectively.

The magnetic and radiometric data is available for free download via GADDS.

The AEM data only is available on CD-ROM at a cost of $99.00 per CD. To obtain these products please contact the Geoscience Australia Sales Centre, GPO Box 378, Canberra, ACT, 2601.

11 September 2007

State-of-the-art seismograph on Niue

Niue seismograph station

The South West Pacific island of Niue is now the proud caretaker of the first Australian built state-of-the-art seismic station in the region.

This station is part of the Australia Tsunami Warning System or ATWS project which is installing a range of tsunami detection equipment around Australia and the Pacific Islands in order to improve tsunami detection and mitigation.

Niue’s location to the east of the Tonga Trench will fill a significant gap in the real-time seismic data available from the region.

"Niue’s location is geographically important for seismic monitoring. There has always been a gap in real-time seismic data in this location, and now the Niue station has filled this gap," said Gordon Cheyne, from the Geoscience Australia Operations Hub of the ATWS. "Data from the station will make a significant contribution to improving the timeliness and accuracy of identifying earthquake magnitudes and locations for events in this area," he said.

Niue was the first country in the Pacific region to sign a memorandum of understanding with Australia to install tsunami warning equipment, and has shown great leadership and support for this initiative.

Over the next two years, the Australian Government hopes to install a number of similar seismographs and other tsunami monitoring equipment in eleven other Pacific island countries. This will assist in improving tsunami warning and mitigation for the entire Pacific region.

Unless otherwise noted, all Geoscience Australia material on this website is licensed under the Creative Commons Attribution 3.0 Australia Licence.