Magnetic field
SGU's products on magnetic fields show measured variations in the magnetic field.
The magnetic properties of the Earth's crust are mainly determined by the content of the mineral magnetite in various rock types. The concentration may vary from nearly zero up to 10% or more in gabbros, and up to almost 100% in iron ores.
The magnetic field has been measured and registered in systematic and detailed airborne surveys. Measured data are corrected and stored in digital form in databases and may for instance be visualized as maps.
Geophysical airborne measurements, magnetic field (detailed)
Geophysical airborne measurements, magnetic field (detailed) contains measured variations in the magnetic total field before and after subtraction of the geomagnetic reference field (DGRF 1965.0). The data contains values for individual measurement points. The measurement point spacing varies depending on where and when the data was collected.
Download the product as a pre-packaged zip file
The link will download the data in GeoPackage format. The contents of the delivery are shown in the product description.
Landing page for OGC API – Features
The link provides documentation in HTML or JSON format for direct access to vector data via OGC API - Features. Main data download format is GeoJSON.
Product description for Geophysical airborne measurements, magnetic fields (overview), in Swedish
Geophysical airborne measurements, magnetic field (detailed) as Web Map Service
Geophysical airborne measurements, magnetic field (detailed) is also available as a Web Map Service (WMS). The Web Map Services are aimed at those of you who want to use our information in your own systems or applications. The services are set up in WMS (Web Map Service) format.
https://resource.sgu.se/service/wms/130/flyggeofysik-magnet
Geophysical airborne measurements, magnetic fields (overview)
During airborne measurements of the Earth's magnetic field, very small variations in the strength of the magnetic field are recorded. This provides information, among other things, about the depth and surface distribution of different rock types and rock units, as well as their strike and dip directions. Faults and their relative movements can also be identified in the magnetic patterns in some cases.
The data product Geophysical airborne measurements, magnetic fields (overview) contains measured variations in the total magnetic field after subtraction of the geomagnetic reference field (DGRF 1965.0). The data are then interpolated to a 200 x 200 m cell size. The measurements are made from low-altitude aircraft from 1960 onwards.
Hämta produkten som färdigpaketerad zip-fil
The link will download data in Text-XYZ format. The contents of the delivery are stated in the product description.
Product description for Geophysical airborne measurements, magnetic fields (overview), in Swedish
Last reviewed 2025-01-24