how earthquake cause fire...
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when earthquake come it destroy a lots of thingh ....and suddenly catches fire .....if the electricity supply is not cut.....
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It is not the earthquakes alone that cause fires, but rather their interaction with human activities and infrastructure.
Before the advent of electricity, houses were heated by gas furnace and fire, lighting was by gas flame or candle flame, cooking was done with fire, either an open flame or in a stove. When an earthquake struck, coals and logs would roll out of stoves and fireplaces, flammable goods like curtains, paper, wooden utensils, ceiling materials, etc. would fall into open cooking flames. Candles would fall into papers or drapes or carpet. And countless little fires would start.
In the ordinary course of things, most fires this size would be rapidly extinguished. But in an earthquake, people are either sheltering in place, fleeing the building or trapped in one part of a building. And there are thousands of small fires. Since people can't put them all out quickly, some of those small fires become large fires, and spread beyond what a city can handle with the post-quake disruptions in infrastructure (broken aqueducts/water lines, blocked streets).
In modern times, the biggest fire hazard is usually gas lines and gas appliances. If a gas appliance gets moved by an earthquake, the gas line can rupture. As gas leaks into the house, it may find an ignition source (often a broken power line or pilot light from another appliance). Then there may be an explosion. Or the burning gas may ignite something else in the home.
Earthquake prone areas like Japan and California now require automatic shutoff valves on gas lines and often restrict the sorts of devices with open flames that can be used indoors in some areas or types of buildings. They also have more complicated water supply networks and reservoirs to help ensure there is water to put out fires even if some of the water mains are broken.
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Before the advent of electricity, houses were heated by gas furnace and fire, lighting was by gas flame or candle flame, cooking was done with fire, either an open flame or in a stove. When an earthquake struck, coals and logs would roll out of stoves and fireplaces, flammable goods like curtains, paper, wooden utensils, ceiling materials, etc. would fall into open cooking flames. Candles would fall into papers or drapes or carpet. And countless little fires would start.
In the ordinary course of things, most fires this size would be rapidly extinguished. But in an earthquake, people are either sheltering in place, fleeing the building or trapped in one part of a building. And there are thousands of small fires. Since people can't put them all out quickly, some of those small fires become large fires, and spread beyond what a city can handle with the post-quake disruptions in infrastructure (broken aqueducts/water lines, blocked streets).
In modern times, the biggest fire hazard is usually gas lines and gas appliances. If a gas appliance gets moved by an earthquake, the gas line can rupture. As gas leaks into the house, it may find an ignition source (often a broken power line or pilot light from another appliance). Then there may be an explosion. Or the burning gas may ignite something else in the home.
Earthquake prone areas like Japan and California now require automatic shutoff valves on gas lines and often restrict the sorts of devices with open flames that can be used indoors in some areas or types of buildings. They also have more complicated water supply networks and reservoirs to help ensure there is water to put out fires even if some of the water mains are broken.
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