Results 41 to 50 of about 388 (138)

Frequency and Amplification for Assessing site Effects and PVS in the Padang City Railway

JIF (Jurnal Ilmu Fisika), 2023
The train uses a special line in the form of railroad tracks that produce vibrations during movement. This study aims to determine the type of soil layer and the peak particle velocity due to the train around the Padang City train line.
Ahmad Fauzi Pohan M.Si, Dwi Pujiastuti, Nadila Syarah, Nurul Annisa   +3 more
doaj   +1 more source

Seismic Site Effects in Owhiro Bay Quarry, Wellington: Field Observations and Numerical Modelling

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Local topography and geology are well known factors affecting the intensity of seismic shaking. We have investigated the seismic site effects at a site of the Owhiro Bay Quarry in Wellington, New Zealand, using instrumental records and numerical models.
Lukas Janku, Marlene Villeneuve
wiley   +1 more source

The Soft Layer Thickness Estimation using Microtremor Measurement to Identify Landside Potential in Watukumpul, Central Java, Indonesia.

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2021
Watukumpul is an area that is prone to landslides, so determining the soft layer thickness is very important to identify the landslide potential. The soft layer thickness can be estimated using microtremor signal measurements which analyzed using the ...
Urip Nurwijayanto Prabowo, Akmal Ferdiyan, Ayu Fitri Amalia   +2 more
doaj   +1 more source

Shallow Shear‐Wave Reflection Surveys in the Wellington Central Business District

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Seismic reflection profiling using shear waves provides constraints on the thickness of sediments beneath the Wellington Central Business District. Standard seismic methods were modified for urban environments where limited grassed areas are available and levels of cultural noise are high.
Sam. B. Thorpe‐Loversuch, Tim. A. Stern, Wanda. R. Stratford   +2 more
wiley   +1 more source

Subsurface Expression of the Lambton Fault and Potential for the Basin Edge Effect in the Wellington Central Business District

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
This study focuses on the subsurface structure of the Wellington basin and an assessment of the shaking potential due to the basin edge‐effect at its western margin. Seismic reflection surveys combined with gravity modelling provide data for a structural model from which to base our shaking analysis.
T. A. Stern, J. N. Louie, M. O. Newton, S. B. Thorpe‐Loversuch, A. I. Stronach, W. R. Stratford   +5 more
wiley   +1 more source

Inferring Cenozoic Cover Thickness and Bedrock Sedimentary Material in 3D From Geophysical Data Using Machine Learning Algorithms: A Case Study in the Lockington Region, Victoria, Australia

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract This study presents a supervised machine learning approach to constructing a 3D geological model for the Lockington area in Victoria, Australia, by integrating borehole observations, geophysical surveys (magnetic, gravity, and radiometric), and elevation data.
Limin Xu, Eleanor C. R. Green, Mark A. McLean   +2 more
wiley   +1 more source

Utilization of Spatially Distributed mHVSR to Assess the Effectiveness of Ground Response Analysis

Earthquake Spectra, Volume 42, Issue 1, February 2026.
One‐dimensional ground response analyses (GRAs) can introduce model error to site response estimates when wave propagation is not dominated by vertically propagating shear waves. We investigate whether the variability of spatially distributed microtremor‐based horizontal‐to‐vertical spectral ratios (mHVSR) is related to GRA effectiveness using data ...
Francisco Javier G. Ornelas, Christopher A. de la Torre, Jonathan P. Stewart   +2 more
wiley   +1 more source

SPAC: An alternative method to estimate earthquake site effects in Mexico City [PDF]

Geofísica Internacional, 2003
Microtremor recordings are a very useful tool for microzonation studies because of simple data acquisition and analysis. The Spatial Autocorrelation Method (SPAC) proposed by Aki (1957), may be used to constrain the velocity structure underlying the site
Jorge Aguirre González, Hortencia Flores Estrella   +1 more
doaj  

Groundwater Transport in a Glaciomarine Aquitard: Paleosalinity and Landslide Implications

Groundwater, Volume 64, Issue 1, Page 49-63, January/February 2026.
Transient 1D modeling of both [Cl] and δ18O demonstrates that advection and diffusion contribute to solute transport in porewater of glaciomarine Champlain Sea muds. Samples with the highest sensitivity (>30) for landslide hazard occur in the current leached zone.
M. J. Hinton, S. Alpay, H. L. Crow
wiley   +1 more source

Shallow Microtremor Array Survey Using Miniature and Small Arrays: Strategy for Efficient and Feasible Dense Survey

Earth and Space Science
We investigated the applicability of miniature microtremor arrays with a radius of a few meters or less to shallow surveys (up to a few tens of meters). It is shown that the upper limit wavelength normalized by the seismometer separation distance s that ...
I. Cho, T. Nakazawa
doaj   +1 more source