Sampling bias in VGP longitudes

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/h989r477f

Descriptions

Attribute Name	Values
Creator	Egbert, Gary D.
Abstract	I derive probability densities for virtual geomagnetic pole( VGP) longitudes for a general statistical model of local magnetic field variations. I show that even for very simple statistically homogeneous models of secular variation, the distribution of VGP longitudes is peaked 90° away from the sampling longitude. Thus, when sites are distributed unevenly, a non-uniform overall distribution of VGP longitudies to be expected. Analysis of the recent geomagnetic field indicates that this bias can be significant, particularly when random errors in paleomagnetic data are allowed for. It is possible that some of the deviations from uniformity seen in recent compilations of paleomagnetic reversal and secular variation data are a statistical artifact resulting from the distortion of the VGP transformation, and the non- uniformity of paleomagnetic sampling sites.
Resource Type	Article
DOI	https://doi.org/10.1029/92GL02549
Date Available	2010-09-28T23:13:15+00:00
Date Issued	1992-12-02
Citation	Egbert, G. D. (1992). Sampling bias in VGP longitudes. Geophysical Research Letters, 19(23), 2353-2356.
Journal Title	Geophysical Research Letters
Journal Volume	19
Dichiarazione dei diritti	Copyright Not Evaluated
Language	English [eng]
Replaces	http://hdl.handle.net/1957/18560