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Preliminary analysis of microacoustic signals associated with rock fracture
Author(s) -
Blacic J. D.,
Malone S. D.
Publication year - 1977
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl004i010p00477
Subject(s) - geology , seismology , brittleness , geotechnical engineering , materials science , composite material
A new experimental rock deformation system utilizing a piston‐cylinder apparatus allows recording of microacoustic signals associated with rock failure with great accuracy over a bandwidth of DC‐4MHz. A calibrated response makes possible the measurement of dynamic seismic parameters which may be compared with those predicted by theory. Preliminary analysis of two events generated during brittle shear failure of granite suggests that the strain drop of ∼1 × 10 −4 is similar to that of large earthquakes. A seismic moment of 10 6 dyn‐cm and corner frequency of 600 KHz are consistent, in a general way, with those expected from theory.