Zobrazeno 1 - 10
of 159
pro vyhledávání: '"A, Zaroli"'
Publikováno v:
In Physics of the Earth and Planetary Interiors February 2024 347
Publikováno v:
Seismica, Vol 2, Iss 2 (2023)
In this study, we focus on Northwest Iran and exploit a dataset of Rayleigh-wave group-velocity measurements obtained from ambient noise cross-correlations and earthquakes. We build group-velocity maps using the recently developed SOLA Backus-Gilbert
Externí odkaz:
https://doaj.org/article/a2475eb10f8b4037a889dfe10e4d658b
Akademický článek
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The conjugate gradient method is a widely used algorithm for the numerical solution of a system of linear equations. It is particularly attractive because it allows one to take advantage of sparse matrices and produces (in case of infinite precision
Externí odkaz:
http://arxiv.org/abs/1709.03092
Imaging seismic velocity of the Earth has been implemented widely for years. The majority of these studies are based on linear or non-linear methods that minimize the difference between seismic observations and predictions of these observations from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e051be68b48bdccd93413e35469e12b0
https://doi.org/10.5194/egusphere-egu23-30
https://doi.org/10.5194/egusphere-egu23-30
Linking geodynamic models to observations from seismology is essential for improving our understanding of the present-day thermodynamic state of the mantle. From the geodynamic perspective, 3D mantle circulation models (MCMs) yield physically relevan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1189499932b13aa855ad2d441599b3c8
https://doi.org/10.5194/egusphere-egu23-6676
https://doi.org/10.5194/egusphere-egu23-6676
Seismic tomography provides valuable insights into the structure, composition and evolution of the mantle. However, the origin of structures like the Large-Low-Velocity-Provinces (LLVPs) in the lowermost mantle remains debated. Their velocity anomali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e866ad04d1e5fd74553d7e1938ba4ec
https://doi.org/10.5194/egusphere-egu23-8416
https://doi.org/10.5194/egusphere-egu23-8416
For a thorough understanding of the impact of mantle convection on vertical motions of the lithosphere, computational modeling plays a crucial role. Mantle circulation can be modeled by solving the equations of motion of a fluid using Earth-like inpu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71697877955169aa2530bd1b297a6ff5
https://doi.org/10.5194/egusphere-egu23-17312
https://doi.org/10.5194/egusphere-egu23-17312
Publikováno v:
Geophysical Journal International. 230:893-907
SUMMARY Since most tomographic problems deal with imperfect data coverage and noisy data, an estimate of the seismic velocity in the Earth can only be a local average of the ‘true’ velocity with some attached uncertainty. We use the SOLA (subtrac
Publikováno v:
Solid Earth, Vol 4, Iss 2, Pp 357-371 (2013)
In a linear ill-posed inverse problem, the regularisation parameter (damping) controls the balance between minimising both the residual data misfit and the model norm. Poor knowledge of data uncertainties often makes the selection of damping rather a
Externí odkaz:
https://doaj.org/article/e3ef0f74d32c4b6f8160f263a6937ffe