Publication Date:
2017-05-31
Description:
To optimize magnitude estimation for the earthquake early warning system around the Tehran region, different amplitude- and frequency-based parameters, that is, predominant period ( ), characteristic period ( c ), log-average period ( log ), and peak displacement ( P d ) were analyzed in this article. All parameters were calculated directly from seismic records, with an epicentral distance less than 150 km, and within the initial 3 s of the P waves. The analysis of earthquakes in the 2.4〈 M L 〈4.9 magnitude range verified that the result of showed a consistent trend as compared with the global observations, and provided a robust estimate of magnitude for the dataset used in this research. In comparison with worldwide observations, the calculated P d and c were underestimated, and there was no scaling relationship with the log parameter. When combined with the global observations from Japan, Taiwan, and Italy, the results of P d and c for the Tehran region produced optimized results.
Print ISSN:
0037-1106
Electronic ISSN:
1943-3573
Topics:
Geosciences
,
Physics
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