Pattern Analysis

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1) Classification of Patterns and Mathematical Dimensioning

 The assumptions considered in this approach:

a) When the total amount of shear stress on the fault system overcomes the frictional resistance, the static friction of the complete or partial fault system switches to dynamic friction and the slipping (earthquake) occurs. (Forebreaks and triggering effects will be handled later)

b) A new steady fault plane is generated after an earthquake.

c) The linear area is the first to be affected during the stress accumulation on the fault plane. If the shear force continually increases over time and also if the system is not ductile as a result of new neighboring formations, the elastic rebound occurs as soon as the hook region is exceeded (partial local movements- forebreaks do not affect the overall assumption).

d) If the affecting force on the brittle point is constant while permanent deformation occurs before the slipping, the straining will change its direction (become brittle) and the decrease will continue until the moment of the earthquake .

e) The low frequency component of the electrical field on the surface that was generated by piezoelectric affect, changes direction when the linear field becomes brittle (the derivative signal changes).

f) The behavior of the system is proportional to the time constant between the moment of breaking-slipping and the time that the field becomes brittle under the constant applied force. The time constant increases as the amount of strained mechanical system portion gets larger. Approximation can be obtained using the stress changes (excluding the pushing moment) by decomposing these changes into parts representing an elastic-frictional field model.

1.1) MT (middle-tem) : The increase of (bb-ba) difference and the permanent difference occuring in the envelope might mean that the effect is local and not superposed by a long distance source.

(!!! Additions will be made !!!)

1.2) Short-term signal change:

T1>T2 must always be true. Generally 10min<T2<120min

2) Analysis of possible signals:

(!!! Additions will be made !!!)

(1.1) Pattern can also exemplify combined structure on the envelope

Theoretical Aspects and References

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