Locations of liquefaction features produced during the 1906 San Francisco earthquake. Liquefaction features are mapped as points, scattered along lines or distributed within larger areas. Many of the liquefaction sites formed in areas of fill that has been placed where there was once Bay or marsh. Note that some of the filled areas that liquefied during the 1989 Loma Prieta earthquake (for example the Marina District of San Francisco) experienced very little liquefaction in 1906, because some of these areas were still part of the Bay and had not yet been filled by man.

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