Results 11 to 20 of about 75,092 (126)

PolarCAP – A deep learning approach for first motion polarity classification of earthquake waveforms

open access: yesArtificial Intelligence in Geosciences, 2022
The polarity of first P-wave arrivals plays a significant role in the effective determination of focal mechanisms specially for smaller earthquakes. Manual estimation of polarities is not only time-consuming but also prone to human errors.
Megha Chakraborty   +6 more
doaj   +1 more source

A Generic Shear Wave Velocity Profiling Model for Use in Ground Motion Simulation

open access: yesGeosciences, 2020
This study presents a generic model for constructing shear-wave velocity (VS) profiles for various conditions that can be used for modeling the upper-crustal modification effects in ground motion simulations for seismic hazard analysis.
Yuxiang Tang   +3 more
doaj   +1 more source

Response of the International Energy Agency (IEA) Wind 15 MW WindCrete and Activefloat floating wind turbines to wind and second-order waves [PDF]

open access: yesWind Energy Science, 2021
The EU Horizon 2020 project COREWIND (COst REduction and increase performance of floating WIND technology) has developed two floating platforms for the new International Energy Agency (IEA) Wind 15 MW reference wind turbine. One design – “WindCrete” – is
M. Y. Mahfouz   +7 more
doaj   +1 more source

S/P Amplitude Ratios Derived from Single-Component Seismograms and Their Potential Use in Constraining Focal Mechanisms for Microearthquake Sequences

open access: yesThe Seismic Record, 2022
Focal mechanisms, which reflect the sense of slip in earthquakes, provide important constraints for understanding crustal tectonics and earthquake source physics, including the interactions among earthquakes during mainshock–aftershock sequences or ...
David R. Shelly   +2 more
doaj   +1 more source

An effective method for laboratory acoustic emission detection and location using template matching

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2022
In this paper, a template matching and location method, which has been rapidly adopted in microseismic research in recent years, is applied to laboratory acoustic emission (AE) monitoring. First, we used traditional methods to detect P-wave first motions
Xinglin Lei   +4 more
doaj   +1 more source

Calibrating a new attenuation curve for the Dead Sea region using surface wave dispersion surveys in sites damaged by the 1927 Jericho earthquake [PDF]

open access: yesSolid Earth, 2019
Instrumental strong motion data are not common around the Dead Sea region. Therefore, calibrating a new attenuation equation is a considerable challenge. However, the Holy Land has a remarkable historical archive, attesting to numerous regional and local
Y. Darvasi, A. Agnon
doaj   +1 more source

Mechanism of High Frequency Shallow Earthquake Source in Mount Soputan, North Sulawesi

open access: yesIndonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v6i3.122Moment tensor analysis had been conducted to understand the source mechanism of earthquakes in Soputan Volcano during October - November 2010 period. The record shows shallow earthquakes with frequency about 5 - 9 Hz.
Yasa Suparman   +2 more
doaj   +1 more source

DiTingMotion: A deep-learning first-motion-polarity classifier and its application to focal mechanism inversion

open access: yesFrontiers in Earth Science, 2023
Accurate P-wave first-motion-polarity (FMP) information can contribute to solving earthquake focal mechanisms, especially for small earthquakes, to which waveform-based methods are generally inapplicable due to the computationally expensive high ...
Ming Zhao   +8 more
doaj   +1 more source

The Effective M3Y Residual Interaction In 41Ca As a Nuclear Diffraction Grating of Electrons

open access: yesمجلة بغداد للعلوم, 2022
The total and individual multipole moments of  magnetic electron scattering form factors in 41Ca  have been investigated using a widely successful model which is the nuclear shell model configurations keeping in mind of 1f7/2 subshell as an L-S shell ...
Rafah M. Hussien, Firas Z. Majeed
doaj   +1 more source

Using a Fractal Analysis and Polarization Method for Phase Identification in Three-Component Seismograms

open access: yesTerrestrial, Atmospheric and Oceanic Sciences, 2010
This study presents the automatic P-wave and S-wave arrivals picking algorithm which is essentially based on the fractal dimension and polarized method.
Boi-Yee Liao   +2 more
doaj   +1 more source

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