Results 121 to 130 of about 14,685 (168)
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Inversion for the Composite Moment Tensor
Bulletin of the Seismological Society of America, 2015Abstract The composite moment tensor is defined in analogy to the composite focal mechanism as the averaged representative seismic moment tensor characteristic for a focal area under study. In contrast to the composite focal mechanism, which provides information on shear faulting, the composite moment tensor can provide additional information on ...
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2007
7.1. Asymptotic Expansion in Free Space 7.2. Properties of EMT’s 7.3. EMT’s Under Linear Transforms 7.4. EMT’s for Ellipses 7.5.
Habib Ammari, Hyeonbae Kang
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7.1. Asymptotic Expansion in Free Space 7.2. Properties of EMT’s 7.3. EMT’s Under Linear Transforms 7.4. EMT’s for Ellipses 7.5.
Habib Ammari, Hyeonbae Kang
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Moment tensors and micromechanical models
Tectonophysics, 2002Abstract A numerical modelling approach that simulates cracking and failure in rock and the associated seismicity is presented and a technique is described for quantifying the seismic source mechanisms of the modelled events. The modelling approach represents rock as an assemblage of circular particles bonded together at points of contact.
James F Hazzard, R.Paul Young
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Moment tensor migration imaging
Geophysical Prospecting, 2014ABSTRACTWe develop and apply an imaging procedure for simultaneous location and characterization of seismic source properties called Moment Tensor Migration Imaging. The procedure constructs images for moment tensor components using a weighted diffraction stack migration, and combines ray‐theoretical Green's functions with a reverse time moment tensor ...
Kit Chambers +4 more
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2006
We know that Euler’s first law (5.43) relates the total external applied force on a rigid body to the motion of its center of mass, and in the next chapter we shall demonstrate that Euler’s second law (5.44) relates the total external applied torque to the body’s rotational motion through its moment of momentum vector.
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We know that Euler’s first law (5.43) relates the total external applied force on a rigid body to the motion of its center of mass, and in the next chapter we shall demonstrate that Euler’s second law (5.44) relates the total external applied torque to the body’s rotational motion through its moment of momentum vector.
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2008
In seismology, linear inversion techniques were proposed to determine the moment tensor component in both time and frequency domains (Stump & Johnson 1977) and (Kanamori & Given 1981). Although all components of the moment tensor must be determined, the moment tensor inversion with constraints has been normally applied to obtaining stable solutions in ...
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In seismology, linear inversion techniques were proposed to determine the moment tensor component in both time and frequency domains (Stump & Johnson 1977) and (Kanamori & Given 1981). Although all components of the moment tensor must be determined, the moment tensor inversion with constraints has been normally applied to obtaining stable solutions in ...
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1981
Originally introduced as a physically meaningful tool to obtain the excitation coefficients of the normal modes of the earth, the moment tensor has since been appreciated as a concept of more general utility. This paper aims to review this development, and at the same time to obtain simple approximations which are hoped to bridge a gap between abstract
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Originally introduced as a physically meaningful tool to obtain the excitation coefficients of the normal modes of the earth, the moment tensor has since been appreciated as a concept of more general utility. This paper aims to review this development, and at the same time to obtain simple approximations which are hoped to bridge a gap between abstract
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Seismological Research Letters, 2012
Online material: Software source code; examples; sample plots. The graphical representation of a focal mechanism as a plot of the radiation pattern on the focal sphere (sometimes referred to as “beachball diagram”) is well established. It consists of a spherical projection on a unit sphere centered at the source point of a seismic event.
Krieger, L., Heimann, S.
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Online material: Software source code; examples; sample plots. The graphical representation of a focal mechanism as a plot of the radiation pattern on the focal sphere (sometimes referred to as “beachball diagram”) is well established. It consists of a spherical projection on a unit sphere centered at the source point of a seismic event.
Krieger, L., Heimann, S.
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Visualization and multivariate clustering of scattered moment tensors
Information Visualization, 2012Moment tensors are indefinite tensors derived from seismic measurements and encode important information about earthquakes and surface displacement in the earth's mantle. Appropriate analysis of scattered moment tensor fields requires multi-scale visualization to identify related seismic events.
Harald Obermaier +4 more
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Moment Tensor Resolvability: Application to Southwest Iberia
Bulletin of the Seismological Society of America, 2012Abstract We present a method to assess the uncertainty of earthquake focal mechanisms based on the standard theory of linear inverse problems. We compute the uncertainty of the moment tensor, M , then map it into uncertainties of the strike, dip, and rake. The inputs are: source and station locations, crustal model, frequency band of interest, and an
Zahradník, J. and S. Custódio
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