Onshore Australia Bouguer Gravity Anomaly Grid 2016

Australia's complete Bouguer gravity anomaly grid for onshore continental areas, derived from over 1.39 million gravity station observations. The grid was generated by the Australian Ocean Data Network using data from federal, state, industry, and academic sources collected from the 1940s to 2016. It incorporates terrain corrections calculated from offshore bathymetry and onshore topography.

Use Cases

• Model subsurface density variations by analyzing complete Bouguer anomaly values across the grid.
• Integrate gravity anomaly data with magnetic or seismic datasets for regional geological interpretation.
• Calculate terrain corrections for gravity surveys using the applied bathymetry and topography methodology.
• Study crustal thickness and isostatic compensation across continental Australia using the anomaly grid.

Strengths

• Derived from a substantial base of over 1.39 million gravity station observations.
• Incorporates terrain corrections from both offshore bathymetry and onshore topography data.
• Data sourced from multiple entities across government, industry, and academia over several decades.

Limitations

• Grid resolution and specific spatial accuracy metrics are not provided in the description.
• Data is static from a 2016 compilation, lacking more recent observations.
• Limited to onshore continental Australia, excluding offshore and territorial island areas.

Provenance

Source

Australian Ocean Data Network, using the Australian National Gravity Database and the 2013 New South Wales Riverina survey.

Collection Method

Grid generation from point gravity station observations, with applied spherical cap Bouguer and terrain corrections.

Time Range

1940s to 2016 (observations), grid generated as of February 2016.

Freshness

null

Geography

Onshore continental Australia.