National Gravity Compilation 2019: Tilt Grid of Australia and Continental Margins

Nearly 1.4 million gravity stations from the Australian National Gravity Database, supplemented with offshore data, were used to generate this tilt grid. The grid has a cell size of 0.00417 degrees (approximately 435m) and covers Australia and its continental margins. Data was collected by government, industry, and research bodies from the 1940s to September 2019 and processed by Geoscience Australia.

Use Cases

• Modeling subsurface geological structures based on gravity anomaly data.
• Mineral and resource exploration targeting based on density variations in the crust.
• Integrating gravity data with other geophysical surveys for regional geological studies.
• Academic research into the tectonic and geological history of the Australian continent.

Strengths

• Derived from nearly 1.4 million quality-checked gravity observations.
• Station spacing in major parts of the continent is between 2.5 and 7 km, suggesting detailed coverage.
• Incorporates decades of data from the 1940s onward, compiled from multiple government and industry sources.
• Terrain corrections were applied using both offshore bathymetry and onshore topography data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific analytical methods.

Provenance

Source

Australian Ocean Data Network, incorporating data from Geoscience Australia's National Gravity Database and global sources from Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

Ground and offshore gravity observations processed with terrain corrections and a tilt filter applied to a spherical cap Bouguer anomaly grid.

Time Range

1940s to September 2019

Freshness

Last updated 2026-06-05 07:22:26.896142; freshness should be verified.

Geography

Australia and its continental margins