The 1929 Grand Banks earthquake occured on November 18 of that year.
In the Atlantic Ocean, off the south coast of Newfoundland, a seaquake of Richter 7.2 occures. The quake is centered on the edge of the Grand Banks, about 250 km south of the island..
It is commonly observed in quicksand, earthquakes, and wave loading.
Although the effects of liquefaction had been observed and understood for years, it was dramatically brought to the attention of engineers and seismologists in 1964 during the Niigata, Japan and Alaska earthquakes.
It was a major factor in the destruction in San Francisco's Marina District during the 1989 Loma Prieta earthquake.
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