Results 21 to 30 of about 32,021 (259)
Eos, Transactions American Geophysical Union, 1984 Surface waves are now being used by several groups to map lateral heterogeneity [Nakanishi and Anderson, 1982, 1983, 1984a, b; Woodhouse and Dziewonski, 1984] and anisotropy [Tanimoto and Anderson, 1984a, b; Nataf et al. 1984] of the upper mantle on a global basis.
openaire +2 more sources
On crustal corrections in surface wave tomography [PDF]
Geophysical Journal International, 2008 SUMMARY Mantle models from surface waves rely on good crustal corrections. We investigated how far ray theoretical and finite frequency approximations can predict crustal corrections for fundamental mode surface waves. Using a spectral element method, we calculated synthetic seismograms in transversely isotropic PREM and in the 3-D crustal model ...
Bozdag, E., Trampert, J.
openaire +2 more sources
Regional-scale joint seismic body- and surface-wave travel time tomography
地球与行星物理论评, 2023 To make full use of seismograms to put tight constraints on the structure of subsurface and earthquake sources has always been the research focus in seismology.
Hongjian Fang +3 more
doaj +1 more source
TRANSVERSE ISOTROPIC CRUST STRUCTURE BENEATH THE NORTHWEST AND CENTRAL NORTH ANATOLIA REVEALED BY SEISMIC SURFACE WAVES PROPAGATION [PDF]
Malaysian Journal of Geosciences, 2021 The Anatolian crust, which is abnormally hot, is widely deformed by subduction related volcanism. Suture zones, transform faults, thrusts and folds and metamorphic core complexes add to the geological complexity.
Özcan Çakır
doaj +1 more source
Smoothness criteria in surface wave tomography [PDF]
Geophysical Journal International, 1990 SUMMARY We discuss and develop further the methods of surface wave tomography in the frame of the geometric ray approximation. The general approach for determining the lateral phase or group velocity distribution, which is a standard 2-D tomography problem, involves linearization, representation of the unknown function as a series in some basis ...
T. B. Yanovskaya, P. G. Ditmar
openaire +1 more source
Geochemistry, Geophysics, Geosystems, 2020 The oceanic lithosphere is a primary component of the plate tectonic system, yet its evolution and its asthenospheric interaction have rarely been quantified by in situ imaging at slow spreading systems.
Nicholas Harmon +5 more
doaj +1 more source
Frontiers in Earth Science, 2023 The tectonic evolution and deformation process of the southeastern Tibetan Plateau has been one of the focuses of the geoscience community in recent decades.
Zhiqi Zhang +5 more
doaj +1 more source
Joint Inversion of Surface Wave Tomography and Body Wave Tomography Applied to 2D Media
82nd EAGE Annual Conference & Exhibition, 2021 Summary Surface Wave Tomography is used to obtain a shear wave velocity model by inverting computed dispersion curves. Body Wave Tomography is used to obtain a longitudinal wave model through travel time inversion of picked first break travel times. Individual inversions suffer from various different limitations.
Karimpour, M. (author) +2 more
openaire +3 more sources
An SVD in Spherical Surface Wave Tomography [PDF]
, 2018 In spherical surface wave tomography, one measures the integrals of a function defined on the sphere along great circle arcs. This forms a generalization of the Funk--Radon transform, which assigns to a function its integrals along full great circles.
Hielscher, Ralf +2 more
openaire +2 more sources
Identifying recharge under subtle ephemeral features in a flat-lying semi-arid region using a combined geophysical approach [PDF]
Hydrology and Earth System Sciences, 2020 Identifying and quantifying recharge processes linked to ephemeral surface water features is challenging due to their episodic nature. We use a combination of well-established near-surface geophysical methods to provide evidence of a surface and ...
B. A. Flinchum +6 more
doaj +1 more source