National Gravity Compilation 2019: Australian Subsurface Bouguer Anomaly Grid

Nearly 1.4 million gravity stations from the Australian National Gravity Database were used to generate this spherical cap Bouguer anomaly grid. The grid has a cell size of 0.00417 degrees (approximately 435m) and is derived from ground observations as of September 2019, supplemented with offshore global data. Geoscience Australia processed and quality-checked the data, which is provided in units of um/s^2 (gravity units).

Use Cases

• Modeling subsurface geological structures based on Bouguer 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 Australia's tectonic and geological history.

Strengths

• Derived from nearly 1.4 million quality-controlled gravity stations from a national database.
• Grid cell size of 0.00417 degrees (approximately 435m) provides a detailed spatial resolution.
• Data is supplemented with v28.1 of the Global Gravity grid for offshore coverage.
• Processed and quality-checked by Geoscience Australia geophysicists.

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.
• Last updated 2026-04-30 15:28:59.996337; freshness should be verified against newer compilations.

Provenance

Source

Geoscience Australia Data, incorporating data from the Australian National Gravity Database and Scripps Institution of Oceanography/NOAA/NGA.

Collection Method

Ground gravity observations processed via standard methods and gridded, supplemented with offshore global gravity data.

Time Range

Data snapshot as of September 2019.

Freshness

Last updated 2026-04-30 15:28:59.996337; based on data as of September 2019.

Geography

Australia, including offshore areas.