Time-scale invariances in preseismic electromagnetic radiation, magnetization and damage evolution of rocks

研究成果: Article査読

11 被引用数 (Scopus)

抄録

We investigate the time-scale invariant changes in electromagnetic and mechanical energy releases prior to a rock failure or a large earthquake. The energy release processes are caused by damage evolutions such as crack propagation, motion of charged dislocation, area-enlargement of sheared asperities and repetitive creep-rate changes. Damage mechanics can be used to represent the time-scale invariant evolutions of both brittle and plastic damages. Irreversible thermodynamics applied to the damage mechanics reveals that the damage evolution produces the variations in charge, dipole and electromagnetic signals in addition to mechanical energy release, and yields the time-scale invariant patterns of Benioff electromagnetic radiation and cumulative Benioff strain-release. The irreversible thermodynamic framework of damage mechanics is also applicable to the seismo-magnetic effect, and the time-scale invariance is recognized in the remanent magnetization change associated with damage evolution prior to a rock failure.

本文言語English
ページ(範囲)599-606
ページ数8
ジャーナルNatural Hazards and Earth System Science
7
5
DOI
出版ステータスPublished - 2007

ASJC Scopus subject areas

  • 地球惑星科学(全般)

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