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Extracting Stable Seismic Core Phases from Ambient Seismic Noise
Islamic Azad Univ, Dept Phys, Damavand Branch, Damavand 39715194, Iran..
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics. Univ Tehran, Inst Geophys, Tehran 141556466, Iran..
2016 (English)In: Bulletin of The Seismological Society of America (BSSA), ISSN 0037-1106, E-ISSN 1943-3573, Vol. 106, no 1, 307-312 p.Article in journal (Refereed) PublishedText
Abstract [en]

Ambient seismic-noise correlation is a powerful tool for extracting the seismic core phases that propagate through the interior of the Earth. In this study, we present and refine the root-mean-square-stacking method to extract stable core phases (e.g., PcP, ScS, PcS/ScP, and PKiKP) from within the Central Alborz region, Iran, using empirical Green's functions. Our studies on the extracted core phases using empirical Green's functions indicated that the ambient seismic noise method is independent from global seismicity (M >= 5.5). We also show that, by dividing ambient seismic records into shorter (i.e., 2700 s) and overlapping (70%) time windows, before the cross-correlation procedure, we can improve the quality and stability of the empirical Green's functions generated. Consequently, 73 days (equivalent to 22% of the total time period for the dataset) of nonconsecutive ambient seismic-noise time windows have been used to retrieve core-phase empirical Green's functions in a 5-10 s period band.

Place, publisher, year, edition, pages
2016. Vol. 106, no 1, 307-312 p.
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URN: urn:nbn:se:uu:diva-277778DOI: 10.1785/0120150031ISI: 000368588200024OAI: oai:DiVA.org:uu-277778DiVA: diva2:905829
Available from: 2016-02-23 Created: 2016-02-23 Last updated: 2016-02-23Bibliographically approved

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Shomali, Zaher-Hossein
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