Potential for geophysical experiments in large scale tests
Potential research applications for large-specimen geophysical experiments include measurements of scale dependence of physical parameters and examination of interactions with heterogeneities, especially flaws such as cracks. In addition, increased specimen size provides opportunities for improved recording resolution and greater control of experimental variables. Large-scale experiments using a special purpose low stress (<40 MPa) bi-axial apparatus demonstrate that a minimum fault length is required to generate confined shear instabilities along pre-existing faults. Experimental analysis of source interactions for simulated earthquakes consisting of confined shear instabilities on a fault with gouge appears to require large specimens (approx.1m) and high confining pressures (>100 MPa).
- Research Organization:
- U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025
- OSTI ID:
- 5427605
- Journal Information:
- Geophys. Res. Lett.; (United States), Vol. 8:7
- Country of Publication:
- United States
- Language:
- English
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