Abstract
Measurements of the difference in total field ΔF(t) have been made over a 16 km N-S path near Boulder. The behavior observed is quite different from that for an E-W path. The present accuracy of the narrow line rubidium magnetometers used is about 0.01 γ. The N-S variations appear to correlate mainly with variations in H rather than D, and may be associated with either gradients of external fields or currents in shallow conductivity anomalies. More recently three magnetometers have been set up on a straight E-W line so that the ‘second difference’ can be measured, and a transfer function from field component variation to the second difference can be determined. A generalization of this approach will be used for analyzing USGS tectonomagnetic data from California.
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© 1979 Center for Academic Publications Japan
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Ware, R.H., Bender, P.L. (1979). Noise Reduction Techniques for Use in Determining Local Geomagnetic Field Changes. In: Fuller, M., Johnston, M.J.S., Yukutake, T. (eds) Tectonomagnetics and Local Geomagnetic Field Variations. Advances in Earth and Planetary Sciences, vol 5. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9825-0_8
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DOI: https://doi.org/10.1007/978-94-010-9825-0_8
Publisher Name: Springer, Dordrecht
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