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: Earthquake

  1. #1

    Jul 2011
    -
    15,678

    Earthquake


    ɡ . .
    () (Asthenosphere) . 1 10: 1 4 ء 4 6 ʡ 710





  2. #2

    Jul 2011
    -
    15,678

    : Earthquake






    ǡ (Earthquake Seismology) 350



    1906 (Reid)
    (Elastic Rebound)





    ɡ . .






    1962
    (Plate Tectonics)


    (A. Wegener)





    (Lithosphere)




    (Plates) 70 100 ( 1) ͡ (Asthenosphere) غ : ( ) (12)

    :

    - (Asthenosphere)

    - Lithosphere .

    - . .

    - .

    -



    : ( * ) (1- 2)



    ǡ



    Divergence Zones:


    (Normal Fault) 30




    Convergence Zones


    ǡ ɡ

    (Reverse Faults)




    _
    60 300.




    :
    .


    3 : Transform Zones:

    (Transform Faults) . 20 ǡ ɡ .


  3. #3

    Jul 2011
    -
    15,678

    : Earthquake



    ( )






    . : ( ) (4) : ɡ ɡ ǡ ǡ .

    : .

    ( )

    The CircumPacific Belt.

    69% 80 % ǡ 1970 1985 1923 1964 1995.

    ǡ Alpide Belt 21% 10% .

    .

    ɡ Intraplate Earthquakes 1992.




    :

    ɡ Hypocenter Epicenter Focal Depth :




    1- : Body Waves:

    ǡ


    :
    (Primary Waves P) (pressional Waves) ɡ ɡ ɡ ( 15 ).

    :

    (Shear Waves) ɡ (Secondary Waves).



    ( ) ֡ . ѡ .



    2 : Surface Waves:

    (L Surface Waves) ǡ ǡ . :

    :
    (Love) ǡ ء .

    :

    (Rayleigh) ǡ ɡ .

    ɡ ֡ . ϡ ߡ ʡ ǡ ɡ .

    Seismometers . .

    Seismograms .

    . :

    - 70 .

    - 70 - 300 .

    - 300 - 670 .

    Mainshock Aftershocks .

    : ( * ). ( ) .


  4. #4

    Jul 2011
    -
    936

    : Earthquake


  5. #5

    Jul 2011
    712

    : Earthquake




  6. #6
      Eiman
    Jul 2011
    -
    14,750

    : Earthquake

    .......

  7. #7

    Aug 2011
    -
    2,566

    : Earthquake

    Thank You Tamara
    ..

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