
Geophysics – Geological data
Geological data from geophysical surveys are used for specific problem settings such as; bedrock conditions before an underground construction, mapping of natural resources, risk analysis of landslides, detection of groundwater magazines and mapping of contaminated sites.
Magnetic field
SGU's products on magnetic fields show measured variations in the magnetic field. 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.
Gravity
Gravity data is primarily used in bedrock mapping. The data can also be used for locating major aquifers. Other areas where gravity data is useful are in conjunction with exploration for ores, in various geodetic applications, for navigation and positioning purposes, deployment of strain gauges, and for calibrating precision balances.
Electrical conductivity
The data products contain information about electromagnetic fields in order to create a picture of the conductivity of the soil. Good electrical conductivity is, for example, associated with certain – often interesting from an ore geological point of view – types of bedrock, water-bearing fracture zones in the bedrock or water-rich soils.
Ground penetrating radar
The data product contains information about ground penetrating radar measurements. The information consists of processed radar images and their positions, in which groundwater levels, geological structures and the bedrock surface can be seen.
Seismic
The data product contains information about seismic measurements. The information consists of interpreted seismic and its position.
Petrophysics
Petrophysics deals with the physical properties of rocks. The properties that have been investigated are primarily the magnetism, density and radiometry of rocks. The porosity of rocks has also been investigated, but to a very limited extent.
Last reviewed 2025-01-24