National Gravity Compilation 2019: Complete Bouguer Anomalies Over Australia

Nearly 1.4 million gravity stations from the Australian National Gravity Database underpin this 2019 grid. Geoscience Australia processed ground and marine data from the 1940s onward to produce a gravity anomaly image with a cell size of approximately 435 meters. The final data, quality-checked by GA geophysicists, reveals subsurface geological structures.

Use Cases

• Modeling subsurface density structures based on gravity anomaly measurements.
• Mapping geological features for mineral exploration based on processed gravity data.
• Integrating gravity data with other geophysical datasets for continental-scale studies.
• Calibrating airborne gravity survey data based on ground station spacing information.

Strengths

• Derived from nearly 1.4 million gravity stations out of a total of approximately 1.8 million observations.
• Station spacing varies from 11 km to less than 1 km, with major parts of the continent covered at 2.5 to 7 km intervals.
• Incorporates data from the 1940s to present day from government, industry, and academic sources, supplemented by global marine data.

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, Commonwealth/State/Territory Governments, mining industry, universities, research organisations, Scripps Institution of Oceanography, NOAA, NGA.

Collection Method

Ground and airborne gravity observations processed via standard methods and terrain corrections.

Time Range

1940s to September 2019.

Freshness

Last updated 2026-05-14 02:58:27.783842; freshness should be verified.

Geography

Australia and its continental margins.