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Thermodynamics with rotation motions: Fragmentation and slip

Majewski E., Teisseyre R.

Acta Geophysica

2013

Vol. 61, no. 2

281--310

Basing on the Asymmetric Continuum Theory, we develop the thermodynamics including fragmentation spin fracture processes; applications for the earthquake source processes are considered. The fracture band model is used to describe a dislocation and disclination superlattice. The Gibbs free energy of defect formation is specified. A dynamic spin fracture criterion was formulated. Consequently, a dynamic model of rock fracture employing dislocations, disclinations, and cracks was constructed to describe slip and fragmentation fracture processes in the earthquake sources.

Application of the fracture-band model to Volcanic-quake series of 1977 at Usu, Hokkaido, Japan

Teisseyre R., Nishimura Y.

Acta Geophysica Polonica

2001

Vol. 49, nr 4

481-496

We present an application of the theory the fracture-band model to the study of volcanicquake series recorded in 1977 at Usu, Hokkaido, Japan. Using as input data the seismic moments, stress drops and seismic radiated energies, we are able to calculate for each event in series the values of seismic efficiency, the total released energy, the top shear stress and crack opening stress (pressure) before event, the source width, and the damage factor. We compare the ranges of magnitude of these quantities with those for tectonic events, mine tremors and icequakes.