Results 61 to 70 of about 1,757 (214)

A frequency‐domain beamforming procedure for extracting Rayleigh wave attenuation coefficients and small‐strain damping ratio from 2D ambient noise array measurements

Earthquake Spectra, Volume 41, Issue 2, Page 1333-1363, May 2025.
The small‐strain damping ratio plays a crucial role in assessing the response of soil deposits to earthquake‐induced ground motions and general dynamic loading. The damping ratio can theoretically be inverted for after extracting frequency‐dependent Rayleigh wave attenuation coefficients from wavefields collected during surface wave testing.
Aser Abbas, Mauro Aimar, Brady R Cox, Sebastiano Foti   +3 more
wiley   +1 more source

Multi‐Scale Geophysical Imaging of a Hydrothermal System in Yellowstone National Park, USA

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Little is known about the local plumbing systems that fuel Yellowstone's famous hot springs, geysers and mud pots. A multi‐method, multi‐scale geophysical investigation was carried out in the Obsidian Pool Thermal Area (OPTA) to: (a) delineate the lateral extent of the hydrothermal area and associated surface features; (b) estimate the ...
Sylvain Pasquet, W. Steven Holbrook, Bradley J. Carr, Neil Terry, Martin A. Briggs, Carol A. Finn, Paul A. Bedrosian, Esben Auken, Jesper Pedersen, Pradip Maurya, Kenneth W. W. Sims   +10 more
wiley   +1 more source

Estimation of bedrock depth for a part of Garhwal Himalayas using two different geophysical techniques

Geoscience Letters, 2018
It has now been well established that the depth of bedrock is a key parameter in assessing the impact of local site conditions on seismic hazard analysis.
Ritu Raj Nath, Gautam Kumar, M. L. Sharma, S. C. Gupta   +3 more
doaj   +1 more source

Notranja oksidacija Cu-C in Ag-C kompozitov [PDF]

, 2012
The internal oxidation in copper-carbon and silver-carbon composites occurs when they are exposed to air or oxygen at high temperature. Solubility of carbon in copper or in silver is very low.
Anžel, Ivan, Kosec, Borut, Kosec, Gorazd, Kosec, Ladislav, Rudolf, Rebeka, Čevnik, Gabrijela   +5 more
core  

Unveiling Cryosphere Dynamics by Distributed Acoustic Sensing and Data‐Driven Hydro‐Thermo Coupled Simulation

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract As global warming continues, the Earth's cryosphere is experiencing severe degradation. This study leverages a novel combination of distributed acoustic sensing (DAS) and artificial intelligence to monitor and decipher cryospheric dynamics. We have developed an advanced time‐lapse surface wave analysis workflow to capture shear wave velocity ...
Haoyuan Sun, Feng Cheng, Jianghai Xia, Jianbo Guan, Zefeng Li, Jonathan B. Ajo‐Franklin   +5 more
wiley   +1 more source

Ground-Motion Observations at Hotel Montana during the M 7.0 2010 Haiti Earthquake: Topography or Soil Amplification? [PDF]

, 2013
Unusually severe structural damage was reported during the 2010 M 7.0 Haiti earthquake in the vicinity of Hotel Montana, located on top of a ridge in the district of Pétionville. Prompted by the observations, U.S.
Assimaki, D., Jeong, S.
core   +1 more source

Assess the Effectiveness of Multichannel Analysis of Surface Waves Method in Mapping Ancient Structures in Ultrashallow Aquatic Environments: The Case of Agioi Theodoroi, Greece

Archaeological Prospection, Volume 32, Issue 1, Page 35-46, January/March 2025.
ABSTRACT The present geophysical research aims to evaluate the applicability of multichannel analysis of surface waves (MASW) on mapping ultrashallow underwater ancient masonry remnants. The work presents the analysis from a single seismic line using MASW and seismic refraction tomography (SRT) methods and its corresponding electrical resistivity ...
George Kritikakis, Nikos Papadopoulos, Nikos Andronikidis, Kleanthis Simyrdanis, Theotokis Theodoulou   +4 more
wiley   +1 more source

Application of geophysical prospecting methods ERT and MASW in the landslide of Daofu County, China

Frontiers in Earth Science, 2023
Natural disasters such as debris flow caused by earthquakes seriously threaten the local infrastructure and economy, as well as the lives of people in the area.
Gang Zhang, Gang Zhang, Gang Zhang, Fangzhou Tu, Yushu Tang, Xingchang Chen, Xingchang Chen, Xingchang Chen, Kuilin Xie, Sen Dai   +9 more
doaj   +1 more source

Prediction and evaluation of nonlinear site response with potentially liquefiable layers in the area of Nafplion (Peloponnesus, Greece) for a repeat of historical earthquakes [PDF]

, 2010
We examine the possible non-linear behaviour of potentially liquefiable layers at selected sites located within the expansion area of the town of Nafplion, East Peloponnese, Greece. Input motion is computed for three scenario earthquakes, selected on the
G. A. Papadopoulos, P. Karmis, P. Tsombos, T. Novikova, V. K. Karastathis, Z. Roumelioti   +5 more
core   +1 more source

Maximizing the energy of surface wave and diminishing the effect of lateral inhomogenousness in the multichannel analysis of the surface wave (MASW)

Science and Technology Development Journal - Natural Sciences, 2019
Multichannel analysis of surface wave (MASW) is one of the novel seismic methods in geophysic field in Vietnam. MASW is able to survey the stiffness of the soil environment under the ground via the shear-wave velocity VS by analyzing the spectral image of surface wave.
Khuong Manh Vo, Trinh Phuc Tran, Van Thanh Nguyen, Luu Van Do, Ngan Nhat Kim Nguyen   +4 more
openaire   +2 more sources