Conventional gradient-based full waveform inversion (FWI) is a local optimization, which highly dependent on the initial model and prone to trapping in minima. Globally optimal FWI that can overcome this limitation particularly attractive, but currently limited by huge amount of calculation. In paper, we propose globally framework based GPU parallel computing, greatly improves efficiency, expec...

SUMMARY 2-D full-waveform inversion (FWI) of shallow-seismic Rayleigh waves has become a powerful method for reconstructing viscoelastic multiparameter models shallow subsurface with high resolution. The reconstruction in FWI is challenging due to the potential presence cross-talk between different parameters and unbalanced sensitivity Rayleigh-wave data respect parameter classes. Accounting in...

The active tectonics in Myanmar is governed by the ongoing northward indentation and obliquely-eastward subduction of India into Eurasia. So far, detailed seismic structure crust uppermost mantle at eastern flank India-Eurasia collision zone remains highly debated. With waveforms recorded 79 broadband stations Myanmar, we build a regional shear velocity model depth range 0–80 km joint inversion...

W reflection seismology, surface waves or ground roll, are often considered a form of unwanted sourcegenerated noise. Unlike body waves, surface waves propagate exclusively in the lateral direction and are virtually insensitive to structure deeper than one wavelength. For a nominal frequency of 5 Hz and phase velocity of 500 m/s, this means that a surface wave of the Rayleigh or Love type only ...

Abstract We consider the local existence and uniqueness of solutions for a system consisting an inviscid fluid with free boundary, modeled by Euler equations, in domain enclosed elastic which evolves according to wave equation. derive priori estimates also conclude uniqueness. Both, are obtained under assumption that data belongs $$H^{r}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML...

[1] Recordings in western Tibet of Rayleigh and Love waves at periods less than 70 s from aftershocks of the 2008 Sichuan earthquake cannot be matched by an isotropic velocity model beneath Tibet. These intermediate‐period Rayleigh and Love waves require marked radial anisotropy in the middle crust of Tibet, with the vertically polarized S‐ waves propagating more slowly than S‐waves with horizo...

Abstract We present distributed fiber-optic sensing data from an airplane landing near the EastGRIP ice core drilling site on Northeast Greenland Ice Stream. The recordings of exceptional clarity contain at least 15 easily visible wave propagation modes corresponding to various Rayleigh, pseudoacoustic, and leaky waves. In frequency range 8 55 Hz, seven can be identified unambiguously. Based a ...

Surface wave method can be used to determine the properties of the component materials of a pavement structure. The measurements are made of the differences in the phase of a wave of the Rayleigh type, received at two points at known radial spacing from the source of the wave. Pavements for highways or airport runways are usually constructed of cement concrete. Such pavements are treated as a s...