Wavelet Analysis and Possible Geophysical Applications
Abstract
While Fourier analysis is good for spectrum analysis of signals with more or less constant frequency components, its usefulness is limited when signals with impulsive components are involved. Wavelet analysis, on the other hand, is perfectly suited to finding frequency components that may not be sinusoidal, such as with pulsed signals. From this perspective, then, wavelets have a promising potential when applied to geophysical systems, such as magnetic storm records, which are composed of impulsive inputs of a non-sinusoidal nature. First results of applying wavelet analysis to a set of ground-based magnetometer data, the Dst index, and other corresponding geomagnetic indices and parameters are presented. The study will focus on dynamics rather than the quasi-static storm profile. An effort will be made to address the question: "Can this technique provide new insights into the spatial/temporal evolution of geomagnetic storms?"
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2001
- Bibcode:
- 2001AGUFMSM31A0749C
- Keywords:
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- 2708 Current systems (2409);
- 2778 Ring current;
- 2788 Storms and substorms