Results 51 to 60 of about 811 (208)

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

Site Effects in the Pollino Region from the HVSR and Polarization of Seismic Noise and Earthquakes [PDF]

, 2018
Site effects have been studied at 15 sites in the area of Mt. Pollino (Italy) through the analysis of seismic noise and earthquakes by horizontal‐to‐vertical spectral ratios (HVSRs) and polarization methods.
Gervasi, Anna, La Rocca, Mario, Ferdinando Napolitano, Scarpa, Roberto, Anna Gervasi, Mario La Rocca, Napolitano, Ferdinando, Roberto Scarpa, Ignazio Guerra, Guerra, Ignazio   +9 more
core   +1 more source

Estimation of glacier thicknesses and basal properties using the horizontal-to-vertical component spectral ratio (HVSR) technique from passive seismic data

Journal of Glaciology, 2017
Microtremor measurements and the horizontal-to-vertical spectral ratio (HVSR) technique, generally used for site effect studies as well as to determine the thickness of soft sedimentary layers, can effectively be ...
STEFANO PICOTTI, ROBERTO FRANCESE, MASSIMO GIORGI, FRANCO PETTENATI, JOSÉ M. CARCIONE   +4 more
doaj   +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

Mapping of soil vulnerability to earthquake using the HVSR method in microtremor measurements in Marga Agung Area, South Lampung Regency

Indonesian Journal of Innovation and Applied Sciences
This study was conducted in Marga Agung Village, Jati Agung Subdistrict, South Lampung Regency, using the Horizontal to Vertical Spectral Ratio (HVSR) method based on microtremor data.
Fransiska Natalia, Alfi Khoiriyyah, Meta Nisrina Syafitri, Risky Martin Antosia   +3 more
doaj   +1 more source

Estimation of VS30 by the HVSR Method at a Site in the Kathmandu Valley, Nepal [PDF]

, 2019
The SAFER (Seismic Safety and Resilience of Schools in Nepal) project work package “New generation seismic hazard for Nepal” aims to produce relevant outcomes for earthquake engineers working in Nepal. In order to improve disaster risk management, enhanced seismic hazard assessment is needed.
Pokhrel, Rama, Gilder, Charlotte, Vardanega, Paul, De Luca, Flavia, Werner, Maximilian, Maskey, Prem   +5 more
openaire  

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

Microtremor Response of a Mass Movement in Federal District of Brazil [PDF]

Anuário do Instituto de Geociências, 2017
The present study provides a brief description of the ambient noise recorded at a slow moving mass movement in Ribeirão Contagem Basin. The area is an interesting natural laboratory as river detachment processes in a number of different stages can be ...
Yawar Hussain, Hernan Martinez-Carvajal, Martin Cárdenas-Soto, Rogério Uagoda, Salvatore Martino, Muhammad B. Hussain   +5 more
doaj   +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

Multi‐scale geophysical mapping of the brine and bedrock surfaces along the Dolores River, Paradox Valley, Colorado, December 2023

Near Surface Geophysics, Volume 24, Issue 1, Page 36-49, February 2026.
Abstract Total dissolved solids derived from salt dome–sourced brine in the underlying alluvial aquifer substantially increase with distance in the reach of the Dolores River that passes through Paradox Valley in southwestern Colorado. The area has been the site of salinity control operations since the 1990s to reduce salt loading to the downstream ...
Neil Terry, Alisa Mast, Andrea Creighton, Joel Homan, Connor Newman, Suzanne Paschke   +5 more
wiley   +1 more source