Record details

    Network sensor calibration for retrieving accurate moment tensors of acoustic emissions
    Charalampidou, E.-M.
    Davi, Rosalia
    Kwiatek, G.
    Vavryčuk, Václav
Publication type
    článek v odborném periodiku
Source title - serial
    International Journal of Rock Mechanics and Mining Sciences
    Roč. 62, September
    s. 59-67
    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
    moment tensors
    sensor calibration
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.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    23. 10. 2014