Results 31 to 40 of about 636,438 (150)

The imprint of crustal density heterogeneities on regional seismic wave propagation [PDF]

, 2016
Density heterogeneities are the source of mass transport in the Earth. However, the 3-D density structure remains poorly constrained because travel times of seismic waves are only weakly sensitive to density.
A. Fichtner, A. Płonka, Seismology, NWO-VIDI: Full waveform inversion for upper-mantle density structure, Plonka, A.I., Blom, N.A., Fichtner, A., N. Blom   +7 more
core   +2 more sources

ASKI: A modular toolbox for scattering-integral-based seismic full waveform inversion and sensitivity analysis utilizing external forward codes

SoftwareX, 2016
Due to increasing computational resources, the development of new numerically demanding methods and software for imaging Earth’s interior remains of high interest in Earth sciences.
Florian Schumacher, Wolfgang Friederich
doaj   +1 more source

Three-dimensional tomographic inversion of combined reflection and refraction seismic travel-time data

, 2003
A tomographic inversion method is presented for the determination of 3-D velocity and interface structure from a wide range of body-wave seismic traveltime data types.
T. A. Minshull, Minshull, Ta, J. W. D. Hobro, Singh, Sc, S. C. Singh, Hobro, Jwd, Minshull, T.A., Hobro, J.W.D., Singh, S.C.   +8 more
core   +1 more source

Joint Regional Waveform, First-Motion Polarity, and Surface Displacement Moment Tensor Inversion of the 3 September 2017 North Korean Nuclear Test

The Seismic Record, 2021
The 3 September 2017 Mw 5.2 North Korean underground nuclear test (DPRK2017) is the largest man-made explosion with surface displacements observed by Synthetic Aperture Radar (SAR) and showed as much as 3.5 m of horizontal permanent deformation. Although
Rodrigo Chi-Durán, Douglas S. Dreger, Arthur J. Rodgers, Avinash Nayak   +3 more
doaj   +1 more source

Stochastic inversion method based on compressed sensing frequency division waveform indication prior

Frontiers in Earth Science
The stochastic inversion method using logging data as conditional data and seismic data as constraint data has a higher vertical resolution than the conventional deterministic inversion method.
Minmin Huang, Leyi Xu, Yanhui Zhu, Ye He, Zhiye Li, Ying Lin   +5 more
doaj   +1 more source

Resource-Efficient Acoustic Full-Waveform Inversion via Dual-Branch Physics-Informed RNN with Scale Decomposition

Applied Sciences
Full-waveform velocity inversion has long been a primary focus in seismic exploration. Full-waveform inversion techniques employing physics-informed recurrent neural networks (PIRNNs) have recently gained significant scholarly attention.
Cai Lu, Jijun Liu, Liyuan Qu, Jianbo Gao, Hanpeng Cai, Jiandong Liang   +5 more
doaj   +1 more source

Wave Equation‐Based Local Traveltime Inversion

Earth and Space Science, 2020
Full waveform inversion (FWI) is a strongly nonlinear optimization problem, which suffers from cycle skipping when the initial velocity model is not good enough or the seismic data lack low frequencies.
Y. Hu, L. G. Han, Y. S. Liu, Z. Y. Jin
doaj   +1 more source

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Full-waveform inversion of short-offset, band-limited seismic data in the Alboran Basin (SE Iberia) [PDF]

Solid Earth, 2019
We present a high-resolution P-wave velocity model of the sedimentary cover and the uppermost basement to ∼3 km depth obtained by full-waveform inversion of multichannel seismic data acquired with a 6 km long streamer in the Alboran Sea (SE
C. Gras, D. Dagnino, C. E. Jiménez-Tejero, A. Meléndez, V. Sallarès, C. R. Ranero, C. R. Ranero   +6 more
doaj   +1 more source

CyberShake NZ: Probabilistic Seismic Hazard Analysis in New Zealand Using Physics‐Based Ground‐Motion Simulations

Earthquake Spectra, Volume 42, Issue 4, November 2026.
This study presents the computational components and workflow developed to conduct probabilistic seismic hazard analysis (PSHA) in New Zealand (NZ) using physics‐based ground‐motion simulations, referred to as “CyberShake NZ.” Semi‐automated procedures generate multiple realizations of kinematic rupture models, create rupture‐specific velocity models ...
Brendon A. Bradley, Moretza Abbasnejadfard, Karim Tarbali, Robin Lee, Sung Bae, Claudio Schill   +5 more
wiley   +1 more source