Australia's 2019 Gravity Anomaly Grid with 435m Resolution

Nearly 1.4 million gravity stations from the Australian National Gravity Database were used to create this tilt-filtered grid. The grid has a cell size of 0.00417 degrees (approximately 435m) and covers Australia and its continental margins. Data was collected from the 1940s onward by government, industry, and research bodies, with quality checks by Geoscience Australia geophysicists.

Use Cases

• Model subsurface geological structures based on gravity anomaly data.
• Interpret density variations in the Earth's crust for mineral exploration.
• Integrate gravity data with other geophysical datasets for regional geological studies.
• Analyze terrain-corrected gravity signals for tectonic or basin analysis.

Strengths

• Derived from nearly 1.4 million quality-checked gravity stations out of approximately 1.8 million total observations.
• Grid cell size of 0.00417 degrees (approximately 435m) provides a detailed spatial resolution.
• Data collection spans from the 1940s to the present, offering a long temporal baseline.
• Incorporates both onshore and offshore data, including a global gravity grid from Scripps Institution of Oceanography.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific computational tasks.
• Last updated 2026-06-27 17:28:34.132850; freshness should be verified for current applications.

Provenance

Source

Australian National Gravity Database (ANGD) and Global Gravity grid from Scripps Institution of Oceanography, NOAA, and NGA.

Collection Method

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

Time Range

1940s to September 2019.

Freshness

Last updated 2026-06-27 17:28:34.132850.

Geography

Australia and its continental margins.