National Gravity Compilation 2019: Australian Bouguer Anomaly Grid

Approximately 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 data from Scripps Institution of Oceanography, NOAA, and NGA. Geoscience Australia processed and quality-checked the data to ensure it is fit-for-purpose for revealing subsurface geological structure.

Use Cases

• Model subsurface geological structures based on Bouguer gravity anomaly data.
• Support mineral and resource exploration by identifying density contrasts in the crust.
• Integrate with other geophysical datasets for regional tectonic studies based on the gravity grid.
• Calibrate or validate satellite-derived gravity models using the ground-based observations.

Strengths

• Derived from nearly 1.4 million quality-checked gravity stations.
• Grid cell size of 0.00417 degrees (approximately 435m) provides detailed spatial resolution.
• Data processed and quality-checked by Geoscience Australia geophysicists.
• Supplemented with offshore data from authoritative global sources (Scripps, NOAA, NGA).

Limitations

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

Provenance

Source

Geoscience Australia Data, Australian National Gravity Database, and global grids from Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

Ground gravity observations processed via standard methods and gridded into a spherical cap Bouguer anomaly.

Time Range

Observations as of September 2019.

Freshness

Last updated 2026-03-25 17:03:31.653928; freshness should be verified.

Geography

Australia and surrounding offshore areas.