Results 1 to 10 of about 1,191,176 (295)
Horizontal-to-Vertical Spectral Ratio of Ambient Vibration Obtained with Hilbert–Huang Transform [PDF]
Sensors, 2021 The Horizontal-to-Vertical Spectral Ratio (HVSR) of ambient vibration measurements is a common tool to explore near surface shear wave velocity (Vs) structure. HVSR is often applied for earthquake risk assessments and civil engineering projects.
Maik Neukirch +5 more
doaj +2 more sources
Numerical study on the influence of near-fault and far-fault earthquakes on a subway station with emphasis to scattering on the wave propagation [PDF]
Numerical Methods in Civil Engineering, 2023 To improve the design of surface structures built on underground structures to be safe and resistant to earthquake, it is necessary to study the effects of the underground structures on the scattering in wave propagation and the surface ground ...
Mohsen Isari +3 more
doaj +1 more source
Research on basin effect based on 2-D geophysical prospecting profile
Frontiers in Earth Science, 2023 The basin effects alter the frequency content, amplitude and duration of seismic waves with different depth and shape basin. In this paper, we selected 2-D geophysical profiles spanning the Weihe Basin with large area and the Luoquanli Basin with small ...
Chong Wang +8 more
doaj +1 more source
Teleseismic P-Wave Attenuation Beneath the Arabian Plate
Geosciences, 2023 In order to prove that the Arabian Plate is a tectonically active region even in its shield areas, we obtained the attenuation structure tp* of the upper mantle beneath the Arabian Plate by applying the spectral inversion method to the newly established ...
Talal Merghelani +3 more
doaj +1 more source
Applied Sciences, 2021 The Trans-Mexican Volcanic Belt (TMVB), located in central Mexico, is an area for which low to moderate seismic risk is considered. This is based on the limited instrumental data available, even though large historical earthquakes have damaged some urban
L. Francisco Pérez-Moreno +5 more
doaj +1 more source
Quantitative EEG Spectral Power Ratio As Cognitive Biomarker For Patients With Parkinson Disease [PDF]
Egyptian Journal of Medical Research, 2022 Background: Cognitive decline in patients with Parkinson disease (PD) is a major and progressing health problem that needs reliable and objective assessment tools. Aim: Toexplore the value of EEG spectral ratio as cognitive biomarker in patients with PD.
Mostafa Elkholy +4 more
doaj +1 more source
Vibration response of the waste rock dump in open pit mine caused by blasting operation [PDF]
Acta Montanistica Slovaca, 2015 Analysis of slope stability is often solved when designing and realizing waste dumps. Vibration effect needs to be taken into account, especially when the waste dump is situated in close distance to the seismic loading source.
Markéta Lednická, Zdeněk Kaláb
doaj +1 more source
Advances in passive seismic analysis of sediment structure and applications in some typical basins
地球与行星物理论评, 2023 Accurate constraints on sediment structure are of great importance for investigation and exploration of oil and gas resources, evaluation of site response, and imaging of deep crust and mantle structure.
Ruiqing Zhang +3 more
doaj +1 more source
Heritage, 2022 This study aimed to evaluate the soil–structure interaction of three historical buildings at the University of Catania using ambient noise. The results point out the different oscillation modes of Villa Cerami and Palazzo Boscarino buildings sharing a ...
Sabrina Grassi +4 more
doaj +1 more source
Dizhen xuebao, 2023 本文以芦山地震余震为例，分析了基于强震动观测记录的经验格林函数（EGF）谱比法估计地震的拐角频率和应力降的可行性。首先给出能够可靠估计地震拐角频率和应力降的经验格林函数谱比曲线的质量标准；然后利用其估算出17次ML3.8—5.4芦山强余震的拐角频率；最后，参考其它研究给出的地震矩震级，计算出地震应力降。结果显示，芦山强余震的拐角频率主要介于1.0—2.0 Hz之间，应力降平均值为9.98 MPa，且地震应力降表现出明显的震级相关性。
Yehao Fan +3 more
doaj +1 more source