• Office of Emergency Management
    1500 Marilla St.,
    Dallas, Texas 75201
    Phone: (214) 670-4275
    Fax: (214) 670-4677

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    An earthquake is simply the ground shaking caused by the sudden movement of rock in the Earth's crust -- usually at a fault line. Faults are areas of crushed rock between blocks of crust.

    Earthquakes can happen any where, at any time, and for a wide variety of reasons. The United States Geological Survey (USGS) constantly updates their earthquake hazard map in the aftermath of earthquakes in previously stable areas.

    Drop Cover Hold Earthquake Safety infographic pg 1how to be safe in an earthquake infographic