M
Magnar Gullikstad Johnsen
Researcher at University of Tromsø
Publications - 54
Citations - 536
Magnar Gullikstad Johnsen is an academic researcher from University of Tromsø. The author has contributed to research in topics: Ionosphere & Earth's magnetic field. The author has an hindex of 11, co-authored 43 publications receiving 425 citations.
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Journal ArticleDOI
In situ measurement of a newly created polar cap patch
Dag Arne Lorentzen,Joran Moen,Joran Moen,Kjellmar Oksavik,Fred Sigernes,Yoshifumi Saito,Magnar Gullikstad Johnsen +6 more
TL;DR: In this paper, the authors present an overview of the associated solar wind and auroral conditions, and look in detail at the relationship between poleward moving auroral forms (PMAFs) and the creation of polar cap patches using ground-based optical and radar data as well as in situ data from the rocket payload.
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Determining the boundaries of the auroral oval from CHAMP field-aligned current signatures – Part 1
TL;DR: In this paper, the first statistical study on auroral oval boundaries derived from small and medium-scale field-aligned currents (FACs) was presented, and the results were used for the first time.
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Multifrequency tympanometry. Preliminary experiences with a commercially available middle-ear analyzer.
TL;DR: Ears with pathologies in the tympanic membrane and otosclerotic ears have resonance frequencies differing significantly from those of normal ears, and the effects may be explained by considering mass and stiffness components.
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Multi‐instrument observations from Svalbard of a traveling convection vortex, electromagnetic ion cyclotron wave burst, and proton precipitation associated with a bow shock instability
Mark J. Engebretson,Tim K. Yeoman,Kjellmar Oksavik,Finn Søraas,Fred Sigernes,Joran Moen,Joran Moen,Magnar Gullikstad Johnsen,Viacheslav Pilipenko,Viacheslav Pilipenko,J. L. Posch,Marc Lessard,Benoit Lavraud,Michael Hartinger,Lasse Boy Novock Clausen,Lasse Boy Novock Clausen,Tero Raita,Claudia Stolle +17 more
TL;DR: In this paper, an isolated burst of 0.35 Hz electromagnetic ion cyclotron (EMIC) waves was observed at four sites on Svalbard from 0947 to 0954 UT 2 January 2011, roughly 1 h after local noon.
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Ionospheric Response Observed by EISCAT During the 6–8 September 2017 Space Weather Event: Overview
Masatoshi Yamauchi,Tima Sergienko,C-F Enell,Audrey Schillings,Audrey Schillings,Rikard Slapak,Magnar Gullikstad Johnsen,Anders Tjulin,Hans Nilsson +8 more
TL;DR: In this paper, the ionospheric plasma conditions observed by the EISCAT radars in Tromso and on Svalbard, covering 68°-81° geomagnetic latitude, during 6-8 September 2017 are presented.