Record details

Title
    Moment tensor decompositions revisited
Author
    Vavryčuk, Václav
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Journal of Seismology
Vol./nr.
    -, -
Year
    2014
Notes
    doplnit UT ISI + bibl. údaje
    Projekt: GAP210/12/1491, GA ČR, CZ3cav_un_auth*0285048
    Rozsah: 22 s.
Subject category
    dynamics and mechanics of faulting
    earthquake source observations
    seismic anisotropy
    theoretical seismology
Keyword
    Decompositions
    Moment
    Revisited
    Tensor
Abstract (in english)
   The decomposition of moment tensors into isotropic (ISO), double-couple (DC) and compensated linear vector dipole (CLVD) components is a tool for classifying and physically interpreting seismic sources. Since an increasing quantity and quality of seismic data allow inverting for accurate moment tensors and interpreting details of the source process, an efficient and physically reasonable decomposition of moment and source tensors is necessary. In this paper, the most common moment tensor decompositions are revisited, new equivalent formulas of the decompositions are derived, suitable norms of the moment tensors are discussed and the properties of commonly used source-type plots are analysed. The Hudson skewed diamond plot is introduced in a much simpler way than originally proposed.
   It is shown that not only the Hudson plot but also the diamond CLVD-ISO plot and the Riedesel-Jordan plot conserve the uniform distribution probability of moment eigenvalues if the appropriate norm of moment tensors is applied.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    23. 10. 2014