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Seismic source spectra and moment tensors
Physics of the Earth and Planetary Interiors, 1982Abstract When the source spectrum is expanded in powers of frequency, the coefficient of the n th power is a linear function of the n th moment tensor. This shows explicitly the low-frequency approximation by moments of low degree, and suggests suitable ways of extrapolation.
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Estimating Explosion Yields Using Moment Tensor Solutions and Seismic Moment
Seismological Research Letters, 2022Abstract Seismic moment, a measurable and well-understood quantity of seismic sources, is used to estimate the yield of explosions. Application of such a method in the past, as in the manner of mb-derived yields, has been complicated by the effect of variations in the explosion working point, depth, and secondary source effects (such as ...
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Surface strain accumulation and the seismic moment tensor
Bulletin of the Seismological Society of America, 1997Abstract Although the scalar moment accumulation rate within the seismogenic zone beneath a given area is sometimes deduced from the observed average surface strain accumulation rate over that same area (e.g., Working Group on California Earthquake Probabilities, 1995), the correspondence between the two is very uncertain.
J. C. Savage, R. W. Simpson
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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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Seismic Network Calibration for Retrieving Accurate Moment Tensors
Bulletin of the Seismological Society of America, 2012We present a method for calibrating seismic networks in order to retrieve highly accurate seismic moment tensors. The method is based on a joint inversion of large datasets of earthquakes for moment tensors and for amplifications of the network stations, which encompass the instrumental amplifications of sensors and the gain factor of the acquisition ...
R. Davi, V. Vavrycuk
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Reliability tests of moment tensor inversion of anthropogenic seismicity
2021<p>Seismic moment tensor becomes part of basic seismic data processing. For anthropogenic events mostly common and available method to determine mechanism is amplitude inversion. However essential for correct amplitude inversion are good quality data.
Anna Tymińska, Grzegorz Lizurek
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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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Seismic-Moment Tensor of Earthquakes in Azerbaijan for 2012–2015
Russian Geology and Geophysics, 2019Abstract —Seismic-moment tensor solutions for earthquakes in Azerbaijan for 2012–2015 have been calculated with a new method by full waveform inversion of broadband data from modern digital seismic stations and processed statistically.
G.J. Yetirmishli +2 more
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Regional distance seismic moment tensors of nuclear explosions
Tectonophysics, 2002Abstract Nuclear explosions, because of their known location, depth and theoretical source mechanism, provide a means to explore the resolution of non-double-couple and isotropic seismic moment tensors. We perform seismic moment tensor inversions on long-period (50–20 s), three-component velocity seismograms from the Caltech TERRAscope network and ...
Douglas Dreger, Bradley Woods
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Seismic Moment Tensors in Anisotropic Media: A Review
2018Seismic moment tensors of earthquakes in anisotropic media have more complicated properties than in isotropic media. For example. planar shear faulting produces pure double-couple mechanism in isotropy, but generally non-double-couple mechanism in anisotropy.
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