Version 1
: Received: 2 November 2023 / Approved: 3 November 2023 / Online: 3 November 2023 (06:44:46 CET)
How to cite:
Donciu, C.; Serea, E.; Temneanu, M.C. Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes. Preprints2023, 2023110203. https://doi.org/10.20944/preprints202311.0203.v1
Donciu, C.; Serea, E.; Temneanu, M.C. Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes. Preprints 2023, 2023110203. https://doi.org/10.20944/preprints202311.0203.v1
Donciu, C.; Serea, E.; Temneanu, M.C. Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes. Preprints2023, 2023110203. https://doi.org/10.20944/preprints202311.0203.v1
APA Style
Donciu, C., Serea, E., & Temneanu, M.C. (2023). Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes. Preprints. https://doi.org/10.20944/preprints202311.0203.v1
Chicago/Turabian Style
Donciu, C., Elena Serea and Marinel Costel Temneanu. 2023 "Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes" Preprints. https://doi.org/10.20944/preprints202311.0203.v1
Abstract
The earthquake alert of the early warning systems is based on the delay that the S waves have in reference to the P waves and on the interpretation of the P waves’ specific parameters. One of the most used parameters for estimating the moment magnitude of an earthquake is the characteristic period measured in the first 3 seconds of the appearance of the P wave. The typical method determines the characteristic period in the time domain, based on the velocity wave and the displacement wave. In the present work, we present a method for estimating the frequency of the characteristic period. This method includes zero padding of the P wave sequence, conversion of the extended sequence from the time domain to the frequency domain, the identification of local frequency maxima and the calculation of the weighted average of the frequency based on the identified maxima. Tests conducted on synthetic signals, as well as standard deviation evaluation tests for simultaneous recordings on several stations, reveal better performance to the usual method.
Keywords
earthquake; P wave; characteristic period; frequency domain.
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
