Results 81 to 90 of about 5,032 (246)

Evaluating Seismic Ambient Noise Techniques for Detecting Ice‐Bearing Rocks on the Moon

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract One of the primary objectives of upcoming lunar missions is to locate ice‐bearing rocks at the South Pole. While evidence for their presence exists, the exact distribution and quantity remain uncertain. In this study, we evaluate the potential of seismic ambient noise techniques—including seismic interferometry, H/V spectral ratios ...
S. Keil, M. Schimmel, H. Igel
wiley   +1 more source

A New Vibration Analysis Approach for Monitoring the Working Condition of a High-Voltage Shunt Reactor

IEEE Access, 2021
With the rapid development of power grids, the voltage level and capacity of high-voltage shunt reactors (HVSRs) are increasing year by year, and HVSR faults are increasing, especially HVSRs core winding faults.
Pengfei Hou, Hongzhong Ma, Ping Ju, Xuan Chen, Chao Zhu   +4 more
doaj   +1 more source

Variance reduction and signal-to-noise ratio: Reducing uncertainty in spectral ratios [PDF]

, 2011
This paper uses an unusually large dataset to study scatter in site-effect estimation, focusing on how the events that increase uncertainty can be removed from the dataset.
Chávez-García, Francisco J., Ktenidou, Olga-Joan, Pitilakis, Kyriazis D.   +2 more
core   +3 more sources

Seismic Hazard Potential in Yogyakarta Based on HVSR Curve Estimation

IOP Conference Series: Earth and Environmental Science, 2022
Abstract In 2006, the Special Region of Yogyakarta was shaken by a destructive earthquake. The United States Geological Survey (USGS) recorded that the earthquake had a magnitude of 6.3 Mw at a depth of 12.5 km below the surface that was triggered by strike slip fault activity.
B.N. Zega, Z. Zulfakriza, S. Rosalia, N.T. Puspito   +3 more
openaire   +1 more source

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

Recorded displacements in a landslide slope due to regional and teleseismic earthquakes [PDF]

, 2015
Regional and teleseismic earthquakes can induce displacements along joints in a landslideinvolved rocky slope in Central Italy. The rarity of these effects is due to specific physical properties of the seismic signals associated with: (i) the energy ...
Lenti, L., Martino, Salvatore, Paciello, A., Prestininzi, Alberto, Rivellino, S.   +4 more
core   +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

On higher order estimates in quantum electrodynamics [PDF]

, 2009
We propose a new method to derive certain higher order estimates in quantum electrodynamics. Our method is particularly convenient in the application to the non-local semi-relativistic models of quantum electrodynamics as it avoids the use of iterated ...
Matte, Oliver
core   +1 more source