Wavelet-Based Index of Magnetic Storm Activity

Authors

A. Jach, Utah State University
Piotr Kokoszka, Utah State UniversityFollow
Jan Josef Sojka, Utah State UniversityFollow
Lie Zhu, Utah State UniversityFollow

Document Type

Article

Journal/Book Title/Conference

Journal of Geophysical Research: Space Physics

Volume

111

Issue

A09215

Publisher

American Geophysical Union

Publication Date

2006

First Page

1

Last Page

11

Abstract

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.

Comments

Originally published by the American Geophysical Union. Publisher's PDF available thorough the Journal of Geophysical Research: Space Physics.