Wavelet-based index of magnetic storm activity

Details Wavelet-based index of magnetic storm activity Wavelet-based index of magnetic storm activity

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgra..11109215j&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue A9, CiteID A09215

Physics

3

Magnetospheric Physics: Magnetic Storms And Substorms (7954), Ionosphere: Current Systems (2721), Magnetospheric Physics: Ring Current, Ionosphere: Ionospheric Storms (7949)

Scientific paper

A wavelet-based method of computing an index of storm activity is put forward. The new index can be computed automatically using statistical procedures and does not require selecting quiet days and removing the secular component by polynomial fitting. This 1-min index is designed to facilitate the study of the fine structure of geomagnetic storm events and requires only the most recent magnetogram records, e.g., the 2 months including the storm event of interest. It can thus be computed over a moving window as soon as new magnetogram records become available. Averaged over 1-hour periods, it is practically indistinguishable from the standard Dst index.

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