Results 31 to 40 of about 119,173 (294)

The Radiated Energy of the 2004 Sumatra-Andaman Earthquake [PDF]

open access: yes, 2006
We use several independent methods to estimate the radiated energy E_R of the Sumatra-Andaman earthquake (M_w=9.0 to 9.3), and investigate whether the difference in the rupture patterns between north and south is reflected in the difference in the energy
Kanamori, Hiroo
core   +1 more source

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

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

Mechanics of earthquakes [PDF]

open access: yes, 1994
An earthquake is a sudden rupture process in the Earth’s crust or mantle caused by tectonic stress. To understand the physics of earthquakes it is important to determine the state of stress before, during, and after an earthquake.
Kanamori, Hiroo
core   +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

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

System Identification of Constructed Facilities: Challenges and Opportunities Across Hazards [PDF]

open access: yes, 2008
The motivation, success and prevalence of full-scale monitoring of constructed buildings vary considerably across the hazard of concern (earthquakes, strong winds, etc.), due in part to various fiscal and life safety motivators.
News   +3 more
core   +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

A window into the complexity of the dynamic rupture of the 2011 Mw 9 Tohoku-Oki earthquake [PDF]

open access: yes, 2011
The 2011 Mw 9 Tohoku-Oki earthquake, recorded by over 1000 near-field stations and multiple large-aperture arrays, is by far the best recorded earthquake in the history of seismology and provides unique opportunities to address fundamental issues in ...
Ampuero, Jean-Paul   +2 more
core   +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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