Results 201 to 210 of about 6,770 (264)

Subsurface exploration using MASW technique- An inversion combining predominant mode with genetic algorithm

Canadian geotechnical journal (Print)
The genetic algorithm (GA) has been employed to perform the inversion considering the predominant modal curve in the dispersion image using the MASW technique.
Abdullah Talib, Ramdev R. Gohil, Jyant Kumar   +2 more
semanticscholar   +1 more source

Optimal Spread Design for Passive MASW

Proceedings, 2011
The passive surface wave method has the potential to reach investigation depths significantly greater than active sources and can be effectively used in very noisy settings. In this study the optimal spread layout and orientation is investigated and determined that would allow surface wave penetration deep enough into the bedrock to permit studies of ...
B. Leitner, R.D. Miller, J. Ivanov
openaire   +1 more source

Soil Classification Mapping by Vs30 MASW Measurements in Gorontalo City

IOP Conference Series: Earth and Environment
The city of Gorontalo, in the north of Sulawesi Island, has a relatively high potential for earthquake events. This condition is influenced by the meeting of three plates, namely the active subduction zone of the Sulawesi Sea trench, which is subducting ...
Dadang Permana, Sri Widiyantoro, Yoga Dharma Persada, N. Habibah   +3 more
semanticscholar   +1 more source

MATLAB codes for generating dispersion images for ground exploration using different MASW transforms

Geophysics, 2022
A set of codes have been developed in MATLAB for generating multimodal dispersion images by using three different transformation techniques. While performing the multichannel analysis of surface waves (MASW), the field data obtained by using multiple ...
T. Naskar, J. Kumar
semanticscholar   +1 more source

MASW Survey Using Multiple Source Offsets

22nd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 2009
Although it is generally known that the active MASW method tends to average out the near-field effect of surface waves through the slant-stack process implicitly incorporated in dispersion imaging and therefore one optimum source offset (X1) is usually employed for a given survey, a long source offset to ensure recording of long wavelengths can ...
Choon B. Park, JB Shawver
openaire   +1 more source

Advances in Surface Wave Methods – Cascaded MASW-SASW

Near Surface 2005 - 11th European Meeting of Environmental and Engineering Geophysics, 2005
The application of the MASW method in areas that show strong lateral variations in subsurface properties is limited. Traditional SASW may yield a better lateral resolution but the dispersion curves (and thus the subsurface models) obtained with the method may be poor.
Westerhoff, R.S., Brouwer, J.H., Meekes, J.A.C.   +2 more
openaire   +2 more sources

Some Practical Aspects Of Masw Analysis And Processing

21st EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 2008
We use multi-channel analysis of surface waves (MASW) on seismic data in an attempt to test data acquisition parameters and compare those results to reaffirm existing general theoretical recommendations and rules of thumb. Of particular interest were optimum seismic receiver spread size, minimum and maximum receiver offsets and dominant geophone ...
Julian Ivanov, Richard D. Miller, George Tsoflias   +2 more
openaire   +1 more source

MASW for geotechnical site investigation

The Leading Edge, 2013
Multichannel anaylsis of surface waves (MASW) is a seismic surface-wave technique developed specifically for near-surface applications at depths usually shallower than a few tens of meters (Park et al., 1999). Since its introduction in the late 1990s, use of the technique has rapidly increased for two reasons: (1) it provides the ...
openaire   +1 more source

Practical Aspects of MASW Inversion Using Varying Density

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009, 2009
We use multi-channel analysis of surface waves (MASW) on seismic data to assess the practical impact of the assumed compressional-velocity and density parameters on the inverted shear-wave velocity results. The practical secondary-parameter impact evaluation was performed on data acquired in the arctic. The ice-sheet compressional-, shear-wave velocity
J. Ivanov, G. Tsoflias, R. Miller, J. Xia   +3 more
openaire   +1 more source

Higher mode observation by the MASW method

SEG Technical Program Expanded Abstracts 1999, 1999
A higher mode (the first overtone) of high frequency (5–30 Hz) surface waves was observed by using the multi-channel analysis of surface waves (MASW) method at three boreholes located in unconsolidated sediments in the Fraser River Delta, near Vancouver, British Columbia.
Choon B. Park, Richard D. Miller, Jianghai Xia, James A. Hunter, James B. Harris   +4 more
openaire   +1 more source