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DILATANCY THEORY [1 record]

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Record 1 2013-09-27

English

Subject field(s)
  • Vulcanology and Seismology
CONT

Dilatancy theory has ... been used in earthquake prediction. B.A. Bolt (1988) has shown that, as crustal rocks crack under the tectonic strain which precedes an earthquake, changes in pore pressure within the rock cause a temporary reduction in the velocity of the P waves.

French

Domaine(s)
  • Volcanologie et sismologie
DEF

Théorie basée sur l'accroissement du volume des pores des roches dans les zones où un séisme se prépare.

CONT

C'est essentiellement grâce à la formulation d'une théorie dite de la dilatence, théorie basée sur des observations faites en Union soviétique, que cette prévision a été rendue possible. Cette théorie concerne les ondes longitudinales, ondes séismiques associées à la contraction et la dilatation de la croûte terrestre avant que la surface ne reprenne sa forme initiale.

Spanish

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