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Liquefaction

liq·ue·fac·tion
noun

  1.       A state of 'soil liquefaction'
  2. The process of making something, especially a gas, liquid.
     In many ways, the ground becomes something like the quicksand found in children's books.
    "helium can be obtained from the liquefaction of natural gas"

the process of making or becoming liquid. : the state of being liquid. 3. : conversion of soil into a fluidlike mass during an earthquake or other seismic event.

Liquefaction occurs when vibrations or water pressure within a mass of soil cause the soil particles to lose contact with one another. 

Liquefaction takes place when loosely packed, water-logged sediments at or near the ground surface lose their strength in response to strong ground shaking. Liquefaction occurring beneath buildings and other structures can cause major damage during earthquakes.

Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading. 

During the 1989 Loma Prieta Earthquake, the soils underlying the Marina District amplified the ground motion as in 1906 and caused the liquefaction of the superficial sandy materials that were used to fill the old lagoon in 1915

#Liquefaction #CyclicLiquefaction #PoreWaterPressure

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