AREAS OF APPLICATION OF THE METHOD OF SEISMIC ENTROPY  

The method of seismic entropy from the plate-tectonic positions, is developed for the seismoactive regions of compression /Akopian S.Ts., 1998, (htm), pp.9,11/. As it was indicated in this work the physical principle of forecast, placed in the determination of the concept of seismic system, until it was not developed for the zones of spreading. For describing the zones of spreading it is necessary to change the balance of inflow, outflow and internal production of entropy open SS /see formula (13)-(14) on p.11/.

Since 96% of earthquakes on the Earth occur under compression conditions in the zones of interaction of the lithospheric plates (90% are timed to the Pacific Ocean plate and 6% to the Mediterranean-Alpine-Himalayan zone), for them it is possible to use the method of seismic entropy. Let us note that in the zones of spreading in the situation of tension are separated less than 1% total seismic energy of the Earth. On Fig.1 and 2 are given the basic lithospheric plates of the Earth and the characteristic mechanisms of strong earthquakes on their boundaries.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig.1. World map of plate tectonic (USGS)

 

Notations:

 

 

Divergent plate boundary-where new crust is generated as the plates pull away from each other (Type D)

Convergent plate boundary (Type А)

 

Transform plate boundary  (Type В)

 

Diffuse boundary zone – broad belt where deformation occurs and origin of the microplates (Types А, В, С)

 

Selected Hotspots

 

Plate motion

 

 

 

Надвиг-Подвиг

Thrust Fault

 

 

 

Сдвиг

Strick-Slip Fault

 

 

 

Сбросо-сдвиг

Strick-Slip-Normal Fault

 

 

 

Сброс

Normal Fault

Fig.2. Basic types А, В, С, D of the plate boundaries and the characteristic focal mechanisms of earthquake sources.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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