Liquefaction

Liquefaction is the process that takes place when severe earthquakes take place, shaking wet and/or sandy soil until it starts to become liquid, allowing sand to "boil up" to the surface, and causing structures to sink, and/or slopes to fail. Liquefaction causes extreme property damage and commonly takes place in areas near the ocean, lakes, rivers, creeks, streams, and large ponds. Even areas adjacent to intermittent creeks, streams, and rivers such the Los Angeles River, the San Gabriel River, and the Santa Clara River are highly vulnerable. The Los Angeles Alliance has an excellent map on its website showing areas at risk for liquefaction.

 

Earthquake Safety Precautions

 

Following are several suggestions for earthquake safety:

• As soon as you detect an earthquake, take personal possession of your emergency preparedness supply kit and keep it nearby.

• Get under a desk or sturdy table if you are indoors away from any windows. Even safety glass may shatter and cause injuries.

• Never stand under or near anything that can easily fall on you such as a bookcase or large cabinet.

• If you are in bed, cover your head and neck with pillows.

• Stay inside if you are at home. Don't go outside and don't get on the roads.

• If you are outside, stay outside away from buildings that could collapse. Stay in an open area if possible.

• Do not go into elevators. Take the stairs if needed.

• If you are driving, pull over to a large open space that is not beneath power lines or trees. Stay in the vehicle until everything settles down.

 

List of Seismic Faults in Southern California

Earthquake Retrofitting

Earthquake Fault Zones

Disaster Supplies Checklists