Data/hora: 07/06/2024 03:24:14

Provedor de dados: 	5	
País: 	France	
Título: 	Global scale analysis and modeling of primary microseisms	
Autores: 	Gualtieri, L; Stutzmann, E; Juretzek, C; Hadziioannou, C; Ardhuin, Fabrice.	
Data: 	2019-07	
Ano: 	2019	
Palavras-chave: 	Numerical modelling; Computational seismology; Seismic noise; Theoretical Seismology.	
Resumo: 	Primary microseism is the less studied seismic background vibration of the Earth. Evidence points to sources caused by ocean gravity waves coupling with the seafloor topography. As a result, these sources should be in water depth smaller than the wavelength of ocean waves. Using a state-of-the-art ocean wave model, we carry out the first global-scale seismic modeling of the vertical-component power spectral density of primary microseisms. Our modeling allows us to infer that the observed weak seasonality of primary microseisms in the southern hemisphere corresponds to a weak local seasonality of the sources. Moreover, a systematic analysis of the source regions that mostly contribute to each station reveals that stations on both the East and West sides of the North Atlantic Ocean are sensitive to frequency-dependent source regions. At low frequency (i.e., 0.05 Hz), the dominant source regions can be located thousands of kilometers away from the stations. This observation suggests that identifying the source regions of primary microseisms as the closest coasts can be misleading.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00487/59842/62990.pdf

https://archimer.ifremer.fr/doc/00487/59842/62991.pdf

DOI:10.1093/gji/ggz161

https://archimer.ifremer.fr/doc/00487/59842/	
Editor: 	Oxford University Press (OUP)	
Formato: 	application/pdf	
Fonte: 	Geophysical Journal International (0956-540X) (Oxford University Press (OUP)), 2019-07 , Vol. 218 , N. 1 , P. 560-572	
Fonte: 	info:eu-repo/semantics/openAccess

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