Since an earthquake can change the surrounding environment. The damage of earthquake is major from the change of building environment. The danger may be due to falling items, heavy furniture dumping and other non-structural damage, as well as building collapse, floor subsidence and other structural damage.
It is impossible to predict where those safe spaces will be while surrounding areas are changing. The most common phenomenon is that people think the self-expected "The Triangle of the Life Myth" may be generated. However, the horizontal displacement of furniture or objects causing the disappear of the space and people injured.
Warning : People can get hurt during earthquakes because the objects can be shifted while people looking for cover.
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You can look for more details from http://www.shakeout.org/
The steps above are the basic principle. However, adjustment should be made according to the current situation in order to protect yourself.