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TitleAnalysis of geomagnetic hourly ranges
AuthorDanskin, D W; Lotz, S I
SourceSpace Weather vol. 13, issue 8, 2015 p. 458-468,
Alt SeriesEarth Sciences Sector, Contribution Series 20150246
Mediapaper; on-line; digital
File formathtml
Subjectsgeophysics; extraterrestrial geology; geomagnetic variations; geomagnetism; geomagnetic fields; solar variations
Illustrationslocation maps; graphs; histograms
ProgramNorthern Canada Geohazards Project, Public Safety Geoscience
AbstractIn an attempt to develop better forecasts of geomagnetic activity, hourly ranges of geomagnetic data are analyzed with a focus on how the data are distributed. A lognormal distribution is found to be able to characterize the magnetic data for all observatories up to moderate disturbances with each distribution controlled by the mean of the logarithm of the hourly range. In the subauroral zone, the distribution deviates from the lognormal, which is interpreted as motion of the auroral electrojet toward the equator. For most observatories, a substantial deviation from the lognormal distribution was noted at the higher values and is best modeled with a power law extrapolation, which gives estimates of the extreme values that may occur at observatories which contribute to the disturbance storm time (Dst) index and in Canada.
Summary(Plain Language Summary, not published)
The statistics of how the magnetic field of the earth varies due to space weather for the period 1972-2009.