Welcome to 
  Vibrationdata.com
  Earthquake Index 



    
 EARTHQUAKES AND SEISMOLOGY


    
New
    Madrid 1811-12


    
San
    Francisco 1906



    El Centro
    1940


    
Alaska
    1964


    
Haicheng
    1975


    
Loma
    Prieta 1989


    
Northridge
    1994


    
Kobe 1995


    
Sunquakes,
    Marsquakes, Moonquakes


    
Seismographs


    
Magnitude
    Scale

    


    
Transamerica
    Pyramid



    Golden Gate
    Bridge


    
Tacoma Narrows Bridge


    
Volcanoes

    



    
EARTH'S NATURAL FREQUENCY


    
The Earth experiences seismic vibration.
    The fundamental natural frequency of the Earth is 309.286 micro
    Hertz. This is equivalent to a period of 3233.25 seconds, or
    approximately 54 minutes.


    
Reference:

    T.
    Lay and T. Wallace, Modern Global Seismology, Academic Press,
    New York, 1995.

    





    
EXTERNAL WEB LINKS


    
Earthquakes for each state: US
    states
Please send comments and questions to Tom Irvine at: tomirvine@aol.com
 Other Vibrationdata.com Pages:    Home | Science Index