Network sensor calibration for retrieving accurate moment tensors of acoustic emissions

Rosalia Davi; Vaclav Vavrycuk; Elli Maria Charalampidou; Grzegorz Kwiatek

doi:10.1016/j.ijrmms.2013.04.004

Network sensor calibration for retrieving accurate moment tensors of acoustic emissions

Rosalia Davi, Vaclav Vavrycuk, Elli Maria Charalampidou, Grzegorz Kwiatek

School of Energy, Geoscience, Infrastructure and Society

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

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Abstract

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.

Original language	English
Pages (from-to)	59-67
Number of pages	9
Journal	International Journal of Rock Mechanics and Mining Sciences
Volume	62
DOIs	https://doi.org/10.1016/j.ijrmms.2013.04.004
Publication status	Published - Sept 2013

Keywords

Acoustic emissions
Focal mechanisms
Fracturing
Moment tensors
Sensor calibration

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10.1016/j.ijrmms.2013.04.004

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title = "Network sensor calibration for retrieving accurate moment tensors of acoustic emissions",

abstract = "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.",

keywords = "Acoustic emissions, Focal mechanisms, Fracturing, Moment tensors, Sensor calibration",

author = "Rosalia Davi and Vaclav Vavrycuk and Charalampidou, {Elli Maria} and Grzegorz Kwiatek",

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T1 - Network sensor calibration for retrieving accurate moment tensors of acoustic emissions

AU - Davi, Rosalia

AU - Vavrycuk, Vaclav

AU - Charalampidou, Elli Maria

AU - Kwiatek, Grzegorz

PY - 2013/9

Y1 - 2013/9

N2 - 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.

AB - 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.

KW - Acoustic emissions

KW - Focal mechanisms

KW - Fracturing

KW - Moment tensors

KW - Sensor calibration

U2 - 10.1016/j.ijrmms.2013.04.004

DO - 10.1016/j.ijrmms.2013.04.004

M3 - Article

SN - 1365-1609

VL - 62

SP - 59

EP - 67

JO - International Journal of Rock Mechanics and Mining Sciences

JF - International Journal of Rock Mechanics and Mining Sciences

ER -

Network sensor calibration for retrieving accurate moment tensors of acoustic emissions

Abstract

Keywords

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