Automatic detection of geomagnetic sudden commencement via time-frequency clusters

Details Automatic detection of geomagnetic sudden commencement via time-frequency clusters Automatic detection of geomagnetic sudden commencement via time-frequency clusters

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011adspr..48.1537h&link_type=abstract

Advances in Space Research, Volume 48, Issue 9, p. 1537-1544.

Physics

Scientific paper

One of global processes in ionosphere-thermosphere-magnetosphere system is the geomagnetic storms. It is of great importance to develop an algorithm that auto-detects sudden commencement because it could be an indicator of onset of the geomagnetic storm. Automatic detection of geomagnetic sudden commencement is based on time-frequency clusters generated by spectrogram. Proposed algorithm is tested on data set collected from stations belong to the international real-time magnetic observatory network (INTERMAGNET). Maximum standard deviation of algorithm detection times is observed to be one minute of the corresponding arrival times published by National Geophysical Data Center (NGDC).

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