A study of geomagnetic micropulsations

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dc.contributor.advisor Dr. J. R. Storey en
dc.contributor.author Fraser-Smith, A. C. (Antony C.) en
dc.date.accessioned 2008-07-09T00:28:16Z en
dc.date.available 2008-07-09T00:28:16Z en
dc.date.issued 1965 en
dc.identifier.citation Thesis (PhD--Physics)--University of Auckland, 1965. en
dc.identifier.uri http://hdl.handle.net/2292/2592 en
dc.description.abstract The general properties of micropulsations are reviewed, together with some theories of their origin. A particular study is made of the hydromagnetic wave theory and of the probability of these waves being produced by gyrating charged particles in the magnetosphere. The conditions are discussed under which gyration-induced hydromagnetic waves have frequencies within the micropulsation range. Assuming the production of Alfvén waves by some process in the magnetosphere, a layer model is developed to investigate the transmission of these waves down along the Earth’s magnetic field lines to the ionosphere. One feature of this model is a realistic ionospheric termination, in which a phase shift and amplitude reduction may be introduced into back reflected waves. Calculations using the model indicate a definite harmonic structure associated with micropulsations and only a small variation of frequency with geomagnetic latitude; they also provide a good explanation of the frequency structure and diurnal variation of ‘pearls’. en
dc.format Scanned from print thesis en
dc.language.iso en en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof PhD Thesis - University of Auckland en
dc.relation.isreferencedby UoA215716 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title A study of geomagnetic micropulsations en
dc.type Thesis en
thesis.degree.discipline Physics en
thesis.degree.grantor The University of Auckland en
thesis.degree.level Doctoral en
thesis.degree.name PhD en
dc.subject.marsden Fields of Research::260000 Earth Sciences::260200 Geophysics en
dc.rights.holder Copyright: The author en
pubs.local.anzsrc 02 - Physical Sciences en
pubs.org-id Faculty of Science en

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