the problem

In an earthquake, the shaking of a home or apartment can cause damage to gas piping and appliances. This damage can result in releases of natural gas that can lead to fires or even explosions. Structural weaknesses, the absence of appliance anchors, seismic activity, and a lack of flexible pipe connections can all contribute to a greater possibility of natural gas leaks. This problem is so prevalent that natural gas contributes to one of every four fires after an earthquake.

A primary concern when dealing with natural gas leaks and ensuing fires is the protection of property, rather than personal safety, because most homes have several potential exits for escape from a fire.

reduce the possibility of gas leaks

An effective way of REDUCING many natural gas leaks in the first place is to make sure that your water heater and any other appliances using natural gas are properly anchored and have flexible pipe connections.

the simple solution

At a minimum, know how to turn off the natural gas supply to your home. Make sure that you have an appropriate wrench easily accessible. You may also want to join a neighborhood preparedness group or make arrangements with your neighbors so that they can turn off your gas if you are not home and if they smell gas.

one answer -- shut-off valves

One of the most common ways of protecting your home from gas leaks is by installing some sort of shut-off valve. These include Earthquake Actuated Valves, Excess Flow Valves, Methane Detectors, Hybrid Systems, and Manual shut-off valves. Each may have its advantages and disadvantages and these are compared in the following tables. Homeowners should consider their individual needs and use the tables select their best personal option.