Automatic detection of geomagnetic sudden commencement via time-frequency clusters

作者：Hafez Ali G^*; Ghamry Essam

来源：Advances in Space Research, 2011, 48(9): 1537-1544.

DOI：10.1016/j.asr.2011.05.025

• Sudden commencement
• Spectrogram
• Automatic detection
• SC timing
• Wavelet
• INTERMAGNET

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).

• 出版日期2011-11-1