Record details

Title
    Network sensor calibration for retrieving accurate moment tensors of acoustic emissions
Author
    Charalampidou, E.-M.
    Davi, Rosalia
    Kwiatek, G.
    Vavryčuk, Václav
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    International Journal of Rock Mechanics and Mining Sciences
Vol./nr.
    Roč. 62, September
Pages
    s. 59-67
Year
    2013
Notes
    Projekt: FP7 Consortium Project AIM 230669, European Commission, XE3cav_un_auth*0301878
    Projekt: GAP210/12/1491, GA ČR, CZ3cav_un_auth*0285048
    Rozsah: 9 s. : P
Subject category
    acoustic emissions
    focal mechanisms
    fracturing
    moment tensors
    sensor calibration
Keyword
    Accurate
    Acoustic
    Calibration
    Emissions
    Moment
    Network
    Retrieving
    Sensor
    Tensors
Abstract (in english)
   We apply a method for retrieving accurate moment tensors in the acoustic emission (AE) experiments based on the joint inversion of a family of AE events for their moment tensors and for the sensor amplifications including coupling effects between sensors and a specimen. The accuracy and efficiency of the method is tested on AEs recorded during three different temporal stages of a triaxial compression experiment on a cylindrical Bentheim sandstone specimen. The results show improved quality of the moment tensors indicated by significantly lower root-mean-square residuals between observed and predicted amplitudes. The approach is particularly suitable for detailed studies of the source parameters of AE events, to obtain accurate focal mechanisms and seismic moment tensors and for detecting fracturing regime of microcracks.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    23. 10. 2014