Impact of measured and predicted shear wave velocity data on prestack inversion, results of land seismic time-lapse seismic data, Thrace Basin, Turkey

2014 ◽  
Author(s):  
Burcu Selek
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Seismic Data ◽  
Time Lapse ◽  
Velocity Data ◽  
Prestack Inversion ◽  
Thrace Basin

Estimate of shear wave velocity, and its time-lapse change, from seismic data recorded at the SMNH01 station of KiK-net using seismic interferometry

2012 ◽  
Vol 39 ◽  
pp. 128-137 ◽  
Author(s):  
Andrés Pech ◽  
Francisco J. Sánchez-Sesma ◽  
Roel Snieder ◽  
Filiberto Ignacio-Caballero ◽  
Alejandro Rodríguez-Castellanos ◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Seismic Data ◽  
Time Lapse ◽  
Seismic Interferometry

scholarly journals Modelling time-lapse shear-wave velocity changes in an unsaturated soil embankment due to water infiltration and drainage

First Break ◽  
2017 ◽  
Vol 35 (8) ◽  
Author(s):  
Atsushi Suzaki ◽  
Shohei Minato ◽  
Ranajit Ghose ◽  
Chisato Konishi ◽  
Naoki Sakai
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Unsaturated Soil ◽  
Time Lapse ◽  
Water Infiltration ◽  
Velocity Changes

scholarly journals Development of site class and site coefficient maps of Semarang, Indonesia using field shear wave velocity data

2017 ◽  
Vol 101 ◽  
pp. 05010 ◽  
Author(s):  
Windu Partono ◽  
Masyhur Irsyam ◽  
Sri Prabandiyani Retno Wardani
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Velocity Data ◽  
Site Class

SHEAR‐WAVE VELOCITY VERSUS DEPTH IN MARINE SEDIMENTS: A REVIEW

Geophysics ◽  
1976 ◽  
Vol 41 (5) ◽  
pp. 985-996 ◽  
Author(s):  
Edwin L. Hamilton
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Marine Sediments ◽  
Shear Wave Velocity ◽  
Shear Waves ◽  
Shear Velocity ◽  
Velocity Versus ◽  
Velocity Data ◽  
Velocity Gradients

The objectives of this paper are to review and study selected measurements of the velocity of shear waves at various depths in some principal types of unlithified, water‐saturated sediments, and to discuss probable variations of shear velocity as a function of pressure and depth in the sea floor. Because of the lack of data for the full range of marine sediments, data from measurements on land were used, and the study was confined to the two “end‐member” sediment types (sand and silt‐clays) and turbidites. The shear velocity data in sands included 29 selected in‐situ measurements at depths to 12 m. The regression equation for these data is: [Formula: see text], where [Formula: see text] is shear‐wave velocity in m/sec, and D is depth in meters. The data from field and laboratory studies indicate that shear‐wave velocity is proportional to the 1/3 to 1/6 power of pressure or depth in sands; that the 1/6 power is not reached until very high pressures are applied; and that in most sand bodies the velocity of shear waves is proportional to the 3/10 to 1/4 power of depth or pressure. The use of a depth exponent of 0.25 is recommended for prediction of shear velocity versus depth in sands. The shear velocity data in silt‐clays and turbidites include 47 selected in‐situ measurements at depths to 650 m. Three linear equations are used to characterize the data. The equation for the 0 to 40 m interval [Formula: see text] indicates the gradient [Formula: see text] to be 4 to 5 times greater than is the compressional velocity gradient in this interval in comparable sediments. At deeper depths, shear velocity gradients are [Formula: see text] from 40 to 120 m, and [Formula: see text] from 120 to 650 m. These deeper gradients are comparable to those of compressional wave velocities. These shear velocity gradients can be used as a basis for predicting shear velocity versus depth.

scholarly journals Shear Wave Velocity data Survey and Estimation of Necessary Depth for Dynamical Analysis of Deposit Effect in Mashhad

2016 ◽  
Vol 9 (4) ◽  
pp. 3207-3226
Author(s):  
R. Yazdanfar ◽  
N. Hafezi Moghadas ◽  
H Sadeghi ◽  
MR Ghayamghamian ◽  
◽  
...  
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Dynamical Analysis ◽  
Velocity Data ◽  
Data Survey

Physics of shear-waves propagating in saturated and unsaturated soils: new potential for monitoring soil dynamics and stability

2021 ◽  
Author(s):  
Ranajit Ghose
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Unsaturated Soils ◽  
Shear Waves ◽  
Soil Layer ◽  
Time Lapse ◽  
Soil Dynamics ◽  
Near Surface

<p>Shear waves are uniquely informative because of their vector nature – with both polarization and propagation of shear waves being useful sources of information, their sensitivity to <em>in-situ</em> stress and grain-to-grain contact, and also because of the low velocity of shear waves in relatively soft formations - offering short wavelength and hence high resolution. Decimetre-scale resolution found in shear-wave reflection data in soft soil has resulted in new application possibilities. Medium anisotropy extracted from multi-component shear-wave data has provided information on natural symmetries in small-strain rigidity and/or stress in the shallow subsurface, which are caused by factors that are of great interest to the engineers. AVO response of shear waves at near-surface soil-layer boundaries has also proven to be useful for extracting local information in the subsoil.</p><p>In the present research we have looked at the sensitivity of shear-wave velocity and the underlying physics in both saturated and unsaturated near-surface soils, and if these can practically be used for monitoring soil dynamics and soil stability. Time-lapse changes in shear-wave velocity could be used to monitor changes in <em>in-situ</em> stress in the saturated sands. More recently, we have developed methodologies to invert time-lapse shear-wave velocity information together with geo-electrical information to obtain<em> in-situ</em> values of water saturation and suction in different partially saturated soil units. Incorporation of this information in a spatially varying sense is imperative in order to make assessment of stability of unsaturated soil slopes subjected to rainfall, modelling flooding and sediment flows due to increased surface runoff and erosion, sustainable agriculture through in-situ water moisture monitoring, and modelling pollutant transport through soils.</p>

Application of Piezoelectric Film to Measure the Shear Wave Velocity

2013 ◽  
Vol 418 ◽  
pp. 161-164
Author(s):  
Keeratikan Piriyakul
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
New Technique ◽  
Clay Material ◽  
Piezoelectric Film ◽  
Velocity Data ◽  
Sensitive Sensor ◽  
A New Technique ◽  
Good Agreement

This paper purposes a new technique to measure the shear wave velocity by using the piezoelectric film. This piezoelectric film is a very thin, light and high sensitive sensor and is used as a receiving sensor. The details of this new technique and its interpretations on Bangkok clay material are explained. The research found that this new technique is a reasonable technique, giving the shear wave velocity result in good agreement with the shear wave velocity data from the field test.

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