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Title: On the anatomy of acoustic emission

Journal Article · · Journal of the Acoustical Society of America
DOI: https://doi.org/10.1121/10.0034637 · OSTI ID:2482100
 [1];  [2];  [3];  [4]; ORCiD logo [4]
  1. Univ. of Nevada, Reno, NV (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  2. California Institute of Technology (CalTech), Pasadena, CA (United States)
  3. University of Rome (Italy)
  4. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
+ Show Author Affiliations

Abrupt, local frictional fault failure comprises a displacement that is normally accompanied by acoustic emission (AE)—an impulsive elastic wave broadcast with an amplitude proportional to particle velocity. The aggregate of these displacements is the basic fault motion. In laboratory shear experiments, the examination of a sequence of laboratory earthquakes includes continuous measurements of fault motion and the associated AE that is broadcast. From these measurements, connections between the fault motion and cumulative sum of the AE amplitude can be identified. The composition of the AE broadcasts reveals inhomogeneity in the fault mechanical structure from which they arise. This inhomogeneity can be decomposed into a time invariant AE component and an articulated AE component. The articulated AE component serves as a “state of the fault diagnostic” that follows a distinctive pattern to fault failure. Thus, the articulated AE component can be used directly to monitor the state of the fault.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Pennsylvania State University, University Park, PA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Offices; USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC). Office of Basic Energy Sciences (BES)
Grant/Contract Number:
89233218CNA000001; EE0008763
OSTI ID:
2482100
Report Number(s):
LA-UR--24-22606
Journal Information:
Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 6 Vol. 156; ISSN 0001-4966
Publisher:
Acoustical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

References (24)

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