Magnetometer array studies in Finland - determination of single station transfer functions
Item
Title (Dublin Core)
en-US
Magnetometer array studies in Finland - determination of single station transfer functions
Description (Dublin Core)
en-US
In 1981 and 1982 four arrays of 30 or 31 magnetometers were operated on the Baltic Shield in central and south-eastern Finland to measure the natural magnetic field variations. These measurements were used to deduce some information about the lateral variation of the electrical conductivity within the Earth's crust. The stations were situated between latitudes 56° and 64° geomagnetic north. As substorms often extend over this area, most magnetic disturbance events have strong external spatial gradients and are not suitable for determining the electrical conductivity distribution inside the Earth. Some magnetic disturbance events with only smooth external spatial gradients could be selected and used for further analysis. For 11 of these events (2–6 h long), the horizontal spatial wavenumber k has been calculated. The product of the wavenumber k and the inductive scale length C was then used as an acceptance criterion and as a weighting function in the calculation of single station transfer functions. Most of the data were not acceptable for the criterion k · |C| < 0.3 for periods longer than 500 s. Because of the small number of acceptable data the statistical significance was not sufficient for all sites. Despite these problems induction vectors and conducted hypothetical vertical field maps could be used to locate conductivity anomalies. Intensive induction was found in three zones in the area under investigation.
ARK: https://n2t.net/ark:/88439/y036023
Permalink: https://geophysicsjournal.com/article/223
ARK: https://n2t.net/ark:/88439/y036023
Permalink: https://geophysicsjournal.com/article/223
Creator (Dublin Core)
Pajunpaa, K.
Subject (Dublin Core)
en-US
Magnetometer arrays
en-US
Induction vectors
en-US
Source field effects
en-US
Baltic Shield
en-US
Data
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1984-08-30
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/223
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 55 No 1 (1984): Journal of Geophysics; 153-160
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/223/183