National Gravity Compilation 2019: Australian 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 processed data, checked for quality by GA geophysicists, measures small changes in gravity due to subsurface rock density. This 2019 compilation combines ground observations with offshore data from Scripps Institution of Oceanography, NOAA, and NGA.

Use Cases

• Model subsurface geological structures based on gravity anomaly measurements.
• Interpret density variations of rocks beneath the Earth's surface based on processed gravity data.
• Integrate ground and offshore gravity data for continental-scale geophysical analysis.
• Validate geological models using quality-checked Bouguer anomaly grids.

Strengths

• Derived from nearly 1.4 million gravity stations from the Australian National Gravity Database.
• Grid cell size is 0.00417 degrees (approximately 435 meters), providing detailed spatial resolution.
• Processed data was quality-checked by GA geophysicists to ensure fitness for purpose.
• Incorporates offshore data from major institutions like Scripps Institution of Oceanography, NOAA, and NGA.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-05-05 00:31:00.444741; freshness should be verified.

Provenance

Source

Australian Ocean Data Network, incorporating data from the Australian National Gravity Database and Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

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

Time Range

Data from the Australian National Gravity Database as at September 2019.

Geography

Australia, including offshore areas.