Mineral Resources On-Line Spatial Data
Mapping of the earth's magnetic field with the use of airborne electronic magnetometers.
- Magnetic anomaly map of North America [New Window]
- Airborne measurement of the earth's magnetic field over all of North America provides gridded data describing the magnetic anomaly caused by variations in earth materials and structure.
- Compiling magnetic databases [New Window]
- Explains the process used to compile and analyze data from diverse magnetic surveys of an area to produce a consistent synoptic data set portraying the magnetic anomalies of the region.
- Introduction to potential fields: magnetics [New Window]
- Explanation of the Earth's magnetic field and how USGS measures it. Defines magnetic anomaly, induced and remanent magnetism in rocks, and describes magnetic anomaly maps.
- Aeromagnetic surveying in Wisconsin 1977-98 [New Window]
- Aeromagnetic surveying in Wisconsin 1998-99 [New Window]
- Aeromagnetic flight-line measurements and gridded anomaly data
- Geologic and aeromagnetic maps of the Fossil Ridge area and vicinity, Gunnison County, Colorado [New Window]
- Geologic units, structural features, and aeromagnetic anomaly map of the area
- Puget Sound (Washington) aeromagnetic maps and data [New Window]
- Gridded data and maps for individual quadrangles and for the entire compilation
- Washington aeromagnetic maps and data: [New Window]
- Aeromagnetic surveys of Washington state, merged to form seamless grids across the state. Gravity anomaly data are provided as well.
- Aeromagnetic and aeromagnetic-based geologic maps of the Coastal Belt, Franciscan Complex, northern California [New Window]
- New aeromagnetic point observation data with grids as well
- Aeromagnetic and gravity maps of the central Marysvale volcanic field, southwestern Utah [New Window]
- Maps (no data) depicting aeromagnetic and Bouguer gravity anomaly in the study area. Report discusses rock sample density and magnetic properties, but data are buried in PDF tables.