posted on Mar, 12 2011 @ 05:04 PM
During the Loma Prieta Earthquake here in California in 1989, some of the worst damage to buildings & infrastructure was in the Marina District of San
Francisco, to land claimed from the surrounding bay by using landfill methods. Landfill areas are particularly subject to liquefaction during a large
"Major property damage in San Francisco's Marina District 60 mi (97 km) from the epicenter resulted from liquefaction of soil used to create
The Marina district was built on filled land made of a mixture of sand, dirt, rubble, waste, and other materials containing a high percentage of
groundwater. Some of the fill was rubble discarded after the 1906 San Francisco earthquake but most was sand and debris laid down in preparation for
the 1915 Panama-Pacific International Exposition, a celebration of San Francisco's ability to rebound after its terrible catastrophe in 1906.
After the Exposition, apartment buildings were erected on the filled land. In the 1989 earthquake, the water-saturated unconsolidated mud and sand
suffered liquefaction, and the earthquake's vertical shock waves rippled the ground more severely."
IMO the aftereffects that man was recording in the landfill-created park are probably due to soil liquefaction, the weakened areas allowing the
underlying/surrounding water to come creeping back in, possibly visible in this way because this land is open parkland, and not a built-up
And knowing just that much about it, I don't think it would be a good idea to hang around that area in the near future, just in case of more land
breakup, sinkholes, etc, caused by all that seeping water.
edit on 3/12/11 by BuzzCory because: grammar fixed