Western Australia Magnetic Intensity Grid At 0.0025-Degree Resolution

Western Australia onshore plus marine magnetic grid geodetic provides total magnetic intensity (TMI) data measuring variations in the Earth's magnetic field. The grid has a cell size of 0.0025 degrees (approximately 266 meters) with units in nanoTesla. Data was acquired in 2005 by the WA Government and processed by GA (Geoscience Australia) geophysicists.

Use Cases

• Map subsurface geological structure by interpreting magnetic anomaly patterns from the total magnetic intensity grid.
• Identify regions with contrasting rock mineral content by analyzing positive or negative magnetic intensity values in nanoTesla.
• Support mineral exploration by correlating magnetic grid data with known geological formations to locate magnetic susceptibility contrasts.
• Calibrate regional geophysical models using the processed, quality-checked magnetic intensity measurements.

Strengths

• Grid cell size of 0.0025 degrees provides approximately 266-meter spatial resolution.
• Data processed via standard methods and quality-checked by GA geophysicists to ensure fit-for-purpose release.

Limitations

• Specific row/line-kilometre count, line spacing, and terrain clearance for the 2005 survey are not provided.
• Data acquisition year is 2005, which may limit relevance for detecting recent crustal changes.

Provenance

Source

Australian Ocean Data Network, originating from WA Government and Geoscience Australia (GA).

Collection Method

Airborne or marine magnetic survey data acquired in 2005, processed via standard geophysical methods.

Time Range

2005

Freshness

Metadata last updated in 2026, but underlying survey data is from 2005.

Geography

Western Australia, including onshore and marine areas.