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Analysis of the primary and secondary microseisms in the wavefield of the ambient noise recorded in northern Poland

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cris.lastimport.scopus2024-02-12T20:03:16Z
dc.abstract.enSeasonal changes of the primary and secondary microseisms were analysed in the wavefield of the ambient noise recorded during the entire 2014 at the “13 BB star” array located in northern Poland, composed of thirteen, symmetrically arranged, broadband seismic stations. To that, spectral analysis, seismic interferometry, surface scalar wind speed distribution, and beamforming were used. Spectral analysis allowed to observe that a splitting of the secondary microseism peak was present in winter and autumn, and that the primary microseism peak was visible in spring, summer and autumn. Using seismic interferometry, the long-term characteristics of the noise wavefield were recognized. The seasonal variations of the secondary microseism source were described by means of the analysis of the surface scalar wind speed for each month. The splitting of the secondary peak was attributed to the interaction of a strong wind blowing from the North Sea with a weak wind blowing from the Baltic Sea. The seasonal variations of the primary microseism peak were characterized through the frequency-domain beamforming. The peak was identified during spring, summer and autumn, when the generated wavefield was coming from the Baltic Sea. The velocity of the wavefield was evaluated within the 2.0–5.0 km/s range. The described mechanism of generation of the microseisms, based on the interaction of the nearby winds, was found to be consistent with the models reported in the literature.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorGrad, Marek
dc.contributor.authorLepore, Simone
dc.date.accessioned2024-01-24T16:34:07Z
dc.date.available2024-01-24T16:34:07Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number5
dc.description.volume66
dc.identifier.doi10.1007/S11600-018-0194-2
dc.identifier.issn1895-6572
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/100639
dc.identifier.weblinkhttps://link.springer.com/article/10.1007/s11600-018-0194-2
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofActa Geophysica
dc.relation.pages915–929
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enPrimary and secondary microseisms Ambient noise Broadband seismology Fourier analysis Seismic interferometry Beamforming
dc.titleAnalysis of the primary and secondary microseisms in the wavefield of the ambient noise recorded in northern Poland
dc.typeJournalArticle
dspace.entity.typePublication