2019 Isostatic residual grids of Australia using elevation derived and seismic Moho grids

Geoscience Australia and Intrepid Geophysics produced isostatic residual gravity anomaly grids of Australia in 2019. The grids were generated using the Airy isostatic compensation method, incorporating new digital elevation models and both Airy-derived and seismic-derived Moho depth grids. Comparisons show differences between the new models and Geoscience Australia's 2016 and 2019 isostatic models are typically less than a few µm/s².

Use Cases

• Modeling crustal structure and isostatic compensation based on gravity anomaly grids.
• Comparing Airy-derived and seismic-derived Moho depth models for geological interpretation.
• Generating benchmark isostatic residual grids for regional geophysical studies.
• Correcting gravity data for topographic and bathymetric effects for resource exploration.

Strengths

• Grids are compared against Geoscience Australia's 2016 and 2019 isostatic models, showing differences typically less than a few µm/s².
• Methodology is documented in an Intrepid Geophysics report, providing transparency.
• The project involved collaboration between Geoscience Australia and a third-party provider, Intrepid Geophysics.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The seismic-derived Moho depth-based model showed larger differences and was described as sub-optimal.

Provenance

Source

Geoscience Australia and Intrepid Geophysics, via the Australian Ocean Data Network.

Collection Method

Generated using the Airy isostatic compensation method applied to the 2019 national Complete Bouguer Anomaly grid, with new elevation models and seismic Moho grids.

Time Range

Primary data from 2019.

Freshness

Last updated 2026-06-23 03:05:43.089001; freshness should be verified.

Geography

Australia.