Real-time P-wave picking for earthquake early warning system using discrete wavelet transform | ||
| NRIAG Journal of Astronomy and Geophysics | ||
| Volume 9, Issue 1, January 2020, Pages 1-6 PDF (1.09 M) | ||
| DOI: 10.1080/20909977.2019.1698144 | ||
| Authors | ||
| Ali G. Hafez; Ahmed Abdel Azim; M. Sami Soliman; Hideki Yayama | ||
| Abstract | ||
| P-wave picking is one of the important steps for earthquake parameter determination. Although manual inspection of P-wave arrival timing is the most accurate method for detection but, using automated algorithm is a must in order to facilitate this continuous task. In this research article an automated real-time algorithm is introduced to determine P-wave arrival timing of multiple of stations in a sub-network of the Egyptian National Seismic Network (ENSN). This algorithm generates a daily report of all events recorded by this sub-network. The main advantage of this proposed algorithm is its small processing time to give accurate P-wave arrival timings. This merit had been invested to make a proposal for Earthquake Early Warning (EEW) system using this algorithm. Additionally, this algorithm can detect very small events starting from micro-earthquakes due to the use of multiresolution analysis (MRA) of discrete wavelet transform (DWT). Results show a high rate of successful detections of 94.6%with low false alarm rate. | ||
| Keywords | ||
| Seismic network; real time analysis; EEW; P-wave arrivals; DWT and spectral analysis | ||
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