Results 31 to 40 of about 107,236 (205)
The 1980, 1997 and 1998 Azores earthquakes and its seismotectonic implications [PDF]
, 2007 We have studied the focal mechanisms of the 1980, 1997 and 1998 earthquakes in the Azores region from body-wave inversion of digital GDSN (Global Digital Seismograph Network) and broadband data. For the 1980 and 1998 shocks, we have obtained strike– slip
Bezzeghoud, M. +4 more
core +1 more source
Вестник Дагестанского государственного технического университета: Технические науки, 2021 Objective. A study of the structure of the earth's crust by determining the velocities of seismic waves from previously broken sections of the earth's crust.Methods. Two mathematical methods are proposed for determining the seismic wave velocities.
B. I. Shakhtarin +3 more
doaj +1 more source
Finite-frequency sensitivity of body waves to anisotropy based upon adjoint methods [PDF]
, 2007 We investigate the sensitivity of finite-frequency body-wave observables to mantle anisotropy based upon kernels calculated by combining adjoint methods and spectral-element modelling of seismic wave propagation.
Liu, Qinya +3 more
core +1 more source
Novel method to pick P waves based on a grey rational analysis
Natural Hazards Research, 2021 For monitoring the earthquake ground motion, it is essential to rapidly and accurately detecting P waves' arrival in the seismic signal. To detect the seismic events and pick phases' arrival, some traditional methods are based on the statistical theory ...
Jihua Fu +4 more
doaj +1 more source
The direct boundary element method: 2D site effects assessment on laterally varying layered media (methodology) [PDF]
, 2004 The Direct Boundary Element Method (DBEM) is presented to solve the elastodynamic field equations in 2D, and a complete comprehensive implementation is given. The DBEM is a useful approach to obtain reliable numerical estimates of site effects on seismic
Aki +28 more
core +2 more sources
Applied SciencesPassive seismic interferometry is a technique that reconstructs virtual seismic records using ambient noise, such as random noise or microseisms. The ambient noise in passive seismic data contains rich information, with surface waves being useful for the
Xiaolong Li +3 more
doaj +1 more source
Геодинамика и тектонофизика, 2015 Deformation waves as a trigger mechanism of seismic activity and migration of earthquake foci have been under discussion by researchers in seismology and geodynamics for over 50 years.
S. I. Sherman
doaj +1 more source
A physical model for seismic noise generation from sediment transport in rivers [PDF]
, 2012 Measuring sediment flux in rivers remains a significant problem in studies of landscape evolution. Recent studies suggest that observations of seismic noise near rivers can help provide such measurements, but the lack of models linking observed seismic ...
Ampuero, Jean-Paul +3 more
core +1 more source
Novel Frame-Type Seismic Surface Wave Barrier with Ultra-Low-Frequency Bandgaps for Rayleigh Waves
BuildingsSeismic surface waves carry significant energy that poses a major threat to structures and may trigger damage to buildings. To address this issue, the implementation of periodic barriers around structures has proven effective in attenuating seismic waves
Hui Jiang +3 more
doaj +1 more source
Phase statistics of seismic coda waves
, 2009 We report the analysis of the statistics of the phase fluctuations in the coda of earthquakes recorded during a temporary experiment deployed at Pinyon Flats Observatory, California.
B. A. van Tiggelen +6 more
core +2 more sources