Blar i Bergen Open Research Archive på forfatter "Laundal, Karl Magnus"
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Testing the mirror symmetry of Birkeland and ionospheric currents with respect to magnetic latitude, dipole tilt angle, and IMF By
Hatch, Spencer Mark; Laundal, Karl Magnus; Reistad, Jone Peter (Journal article; Peer reviewed, 2022)It is often assumed that on average, polar ionospheric electrodynamics in the Northern and Southern Hemispheres are mirror symmetric or antisymmetric with respect to the interplanetary magnetic field By component and the ... -
Transient high latitude geomagnetic response to rapid increases in solar wind dynamic pressure
Madelaire, Michael; Laundal, Karl Magnus; Reistad, Jone Peter; Hatch, Spencer Mark; Ohma, Anders (Journal article; Peer reviewed, 2022-08-16)Rapid changes in solar wind dynamic pressure can produce a transient geomagnetic response in the high latitude ionosphere. In this study we carry out a superposed epoch analysis of the geomagnetic response based on 2,058 ... -
What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents?
Laundal, Karl Magnus; Gjerløv, Jesper (Peer reviewed; Journal article, 2014-10)In this paper we investigate which coordinate representation is most appropriate when analyzing ground magnetometer data in terms of ionospheric currents, in particular the westward electrojet. The AL and the recently ...