Results 21 to 30 of about 10,693,998 (197)

Identification of Electromagnetic Pre-Earthquake Perturbations from the DEMETER Data by Machine Learning

open access: yesRemote Sensing, 2020
The low-altitude satellite DEMETER recorded many cases of ionospheric perturbations observed on occasion of large seismic events. In this paper, we explore 16 spot-checking classification algorithms, among which, the top classifier with low-frequency ...
Pan Xiong   +5 more
doaj   +1 more source

Hybrid Ground Motion Simulation for the 2013 ML 6.4 Ruisui, Taiwan Earthquake

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2016
The 2013 ML 6.4 Ruisui earthquake struck a seismic gap around the northern part of the Longitudinal Valley where rare earthquakes have occurred for at least two decades.
Yi-Ying Wen   +5 more
doaj   +1 more source

The slow self-arresting nature of low-frequency earthquakes

open access: yesNature Communications, 2021
Low-frequency earthquakes are a series of small earthquakes with lower dominant frequencies than ordinary earthquakes. By comparing the simulated earthquakes with the real data, we find that low-frequency earthquakes represent an earthquake rupture ...
Xueting Wei   +3 more
doaj   +1 more source

VLF/LF Radio Sounding of Ionospheric Perturbations Associated with Earthquakes

open access: yesSensors, 2007
It is recently recognized that the ionosphere is very sensitive to seismic effects,and the detection of ionospheric perturbations associated with earthquakes, seems to bevery promising for short-term earthquake prediction. We have proposed a possible use
Masashi Hayakawa
doaj   +1 more source

Identifying significant earthquake intensity measures for evaluating seismic damage and fragility of nuclear power plant structures

open access: yesNuclear Engineering and Technology, 2020
Seismic design practices and seismic response analyses of civil structures and nuclear power plants (NPPs) have conventionally used the peak ground acceleration (PGA) or spectral acceleration (Sa) as an intensity measure (IM) of an earthquake.
Duy-Duan Nguyen   +3 more
doaj   +1 more source

Structural Damage Evaluation: Theory and Applications to Earthquake Engineering [PDF]

open access: yes, 2004
The further development of performance-based earthquake engineering (PBEE) is on the current agenda of the earthquake engineering community. A part of assessing the seismic performance of civil engineering structures involves estimation of seismic damage.
Shaikhutdinov, R. V.   +1 more
core   +1 more source

EMD based statistical analysis of nighttime pre-earthquake ULF electric field disturbances observed by CSES

open access: yesFrontiers in Astronomy and Space Sciences, 2023
To explore the correlation between earthquakes and spatial ultra-low frequency electric field disturbances and to study the phenomenon of seismic ionospheric disturbances, this study uses 3 years of electric field ULF band data from 2019 to 2021 observed
Bai-Yi Yang   +21 more
doaj   +1 more source

A Nonextensive Statistical Physics Analysis of the 1995 Kobe, Japan Earthquake [PDF]

open access: yes, 2014
This paper presents an analysis of the distribution of earthquake magnitudes for the period 1990–1998 in a broad area surrounding the epicenter of the 1995 Kobe earthquake.
Vallianatos, F   +5 more
core   +1 more source

Investigation on the Impact of the 2022 Luding M6.8 Earthquake on Regional Low-Frequency Time Code Signals in Northern China

open access: yesAtmosphere
Low-Frequency Time Code time service technology, as an important means of ground-based radio time dissemination, can be divided into ground wave zone and sky wave zone according to different receiving and transmitting distances.
Fan Zhao   +9 more
doaj   +1 more source

Metamaterial foundation for seismic wave attenuation for low and wide frequency band

open access: yesScientific Reports, 2023
Metamaterials are periodic structures made by repeating a unit cell. Such a structure shows frequency-specific wave attenuation behaviour. In this work, a 2D metamaterial foundation is proposed for the seismic protection of buildings.
Arpan Gupta   +3 more
doaj   +1 more source

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