Network sensor calibration for retrieving accurate moment tensors of acoustic emissions
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 o...
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| Veröffentlicht in: | International journal of rock mechanics and mining sciences (Oxford, England : 1997) England : 1997), 2013-09, Vol.62, p.59-67 |
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| container_title | International journal of rock mechanics and mining sciences (Oxford, England : 1997) |
| container_volume | 62 |
| creator | Davi, Rosalia Vavryčuk, Václav Charalampidou, Elli-Maria Kwiatek, Grzegorz |
| description | 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.
•Joint inversion for moment tensors and sensor amplifications is suggested.•Novel sensor calibration includes coupling between sensors and the specimen.•Moment tensor inversion yields accurate double-couple (DC) and non-DC components.•The retrieved moment tensors show a significantly lower RMS. |
| doi_str_mv | 10.1016/j.ijrmms.2013.04.004 |
| format | Article |
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•Joint inversion for moment tensors and sensor amplifications is suggested.•Novel sensor calibration includes coupling between sensors and the specimen.•Moment tensor inversion yields accurate double-couple (DC) and non-DC components.•The retrieved moment tensors show a significantly lower RMS.</description><subject>Acoustic emission</subject><subject>Acoustic emissions</subject><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Calibration</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Earthquakes, seismology</subject><subject>Exact sciences and technology</subject><subject>Focal mechanisms</subject><subject>Fracturing</subject><subject>Geotechnics</subject><subject>Internal geophysics</subject><subject>Mathematical analysis</subject><subject>Measurements. Technique of testing</subject><subject>Microcracks</subject><subject>Moment tensors</subject><subject>Sensor calibration</subject><subject>Sensors</subject><subject>Soil mechanics. 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Public works</topic><topic>Calibration</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Earthquakes, seismology</topic><topic>Exact sciences and technology</topic><topic>Focal mechanisms</topic><topic>Fracturing</topic><topic>Geotechnics</topic><topic>Internal geophysics</topic><topic>Mathematical analysis</topic><topic>Measurements. Technique of testing</topic><topic>Microcracks</topic><topic>Moment tensors</topic><topic>Sensor calibration</topic><topic>Sensors</topic><topic>Soil mechanics. 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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.
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| identifier | ISSN: 1365-1609 |
| ispartof | International journal of rock mechanics and mining sciences (Oxford, England : 1997), 2013-09, Vol.62, p.59-67 |
| issn | 1365-1609 1873-4545 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Acoustic emission Acoustic emissions Applied sciences Buildings. Public works Calibration Earth sciences Earth, ocean, space Earthquakes, seismology Exact sciences and technology Focal mechanisms Fracturing Geotechnics Internal geophysics Mathematical analysis Measurements. Technique of testing Microcracks Moment tensors Sensor calibration Sensors Soil mechanics. Rocks mechanics Temporal logic Tensors |
| title | Network sensor calibration for retrieving accurate moment tensors of acoustic emissions |
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