Results 61 to 70 of about 382 (164)

Progressive Layer Stripping Analysis for HVSR Interpretation

The horizontal-to-vertical spectral ratio (HVSR) technique is widely used to determine site fundamental periods from ambient noise recordings, but relating the observed peak to a specific impedance contrast within layered soils remains challenging. This paper presents an enhanced implementation of hvstrip-progressive, a Python package for forward HVSR ...
Fathizadeh, Mersad, Wood, Clinton M., Kianfar, Hosna   +2 more
openaire   +2 more sources

Geophysical imaging of the subsurface seismic structure of the Chestnut Hill Reservoir earth embankment dam (Massachusetts)

Near Surface Geophysics, Volume 23, Issue 2, Page 105-120, April 2025.
Abstract Degradation within a manmade earth embankment structure is often unobservable from the surface. In order to evaluate the structural integrity of earth embankment levees and dams and identify subsurface zones of weakness that may result in the future failures of such structures, various geophysical methods have been proposed as effective ...
Steven J. Maniscalco, John E. Ebel
wiley   +1 more source

Seismic Structure of the Mid to Upper Crust at the Santorini‐Kolumbo Magma System From Joint Earthquake and Active Source Vp‐Vs Tomography

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Santorini volcano has a history of caldera‐forming eruptions, most recently in the Late Bronze Age, at 3.4 kya, and remains volcanically active. The Kolumbo submarine volcano, located 7 km to the northeast of Santorini, erupted in 1650 AD in a deadly phreatomagmatic eruption.
R. S. Hufstetler, E. E. E. Hooft, D. R. Toomey, B. P. VanderBeek, C. B. Papazachos, N. Chatzis   +5 more
wiley   +1 more source

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

Extracting Site Effects From P‐wave spectra: Application of Cluster‐Event Method 2 (CEM2) in the Tohoku Region, Japan

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 1, January 2025.
Abstract Theories related to the Earth's attenuation effect and earthquake source properties predict a similar spectral falloff of body waves, creating severe trade‐off problems when determining these two processes from waveform spectra. Previous efforts attempted to suppress this trade‐off by either applying an empirical Green's function or conducting
Pei‐Ru Jian, Ban‐Yuan Kuo
wiley   +1 more source

Investigating Near Surface S-Wave Velocity Properties Using Ambient Noise in Southwestern Taiwan

Terrestrial, Atmospheric and Oceanic Sciences, 2015
Ambient noise is typically used to estimate seismic site effects and velocity profiles instead of earthquake recordings, especially in areas with limited seismic data.
Chun-Hsiang Kuo, Kuo-Liang Wen, Che-Min Lin, Strong Wen, and Jyun-Yan Huang   +4 more
doaj   +1 more source

Unusual Geophysical Techniques in Archaeology - HVSR and Induced Polarization, A Case History

Proceedings, 2016
Conventionally employed geophysical methods in archaeological investigations , i.e. ground penetrating radar(GPR), magnetometry, geoelectric (electrical resistivity tomography: ERT) and geo-electromagnetic (FDEM) techniques, can be hampered by specific site conditions.
ABU-ZEID, Nasser, Corradini Erica, BIGNARDI, Samuel, Morandi Niccolò, Nizzo Valentino, SANTARATO, Giovanni   +5 more
openaire   +4 more sources

Multimethod Geophysical Imaging of Intermontane Basins: The Case Study of Cascina and Palarzano Plains (Central Apennines, Italy)

International Journal of Geophysics, Volume 2025, Issue 1, 2025.
A novel and integrated geophysical approach has been applied at Cascina and Palarzano plains (Abruzzi region, Central Apennines, Italy) to investigate their subsurface structure with particular attention to the faults bounding the basins. Both plains are characterized by the highest magnetic anomaly intensity measured over the Abruzzi region (up to 10 ...
L. Minelli, I. Nicolosi, F. D’Ajello Caracciolo, R. Carluccio, F. Ferri, L. M. Puzzilli, Pramita Mishra   +6 more
wiley   +1 more source

Combining GPR, Passive Seismic, and Load Testing With Computational Models in the Assessment of Historical Bridges: The Case Study of the Comboa Bridge

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
The preservation of historical bridges usually requires extensive structural evaluations for possible damage detection. Therefore, effective techniques are essential for diagnosis and, consequently, proper maintenance and rehabilitation actions. The combination of techniques provides complementary data that support decision making.
Vega Perez-Gracia, Mercedes Solla, Simona Fontul, Oriol Caselles, Jesús Balado, Rodrigo Alva, Juan Luis Rodríguez-Somoza, Ramón González-Drigo, Łukasz Jankowski   +8 more
wiley   +1 more source

Local Site Effects Evaluation Using Microtremor Measurements at North Side of Pandan Mountain

Journal of Physics: Theories and Applications, 2017
Disaster mitigation has been undertaken to reduce the impact of loss or damage caused by the earthquake. For disaster mitigation purpose, it is necessary to conduct a local geological assessment.
Samsul Hidayat, Dwa Desa Warnana, Sorja Koesuma, C Cari   +3 more
doaj   +1 more source