A road broken by an earthquake. The definition of an earthquake is the release of sudden and extreme energy that is caused by shifting in the Earth's crust. Facts About Earthquakes. A seismometer is used to record and measure the strength of an earthquake. The Mercalli scale is used to measure the earthquake. Anything seven or above is considered extremely dangerous. Earthquakes usually occur along fault lines, or cracks that occur within the Earthâs crust.
2. Internal Revenue Service. (1). (1). 3651 S I H 35 Austin, TX 73301. (512) 499-5875.
by Mail: Patrice Kennemer, Customer Service Coordinator, PO Box 149347, MC-1913, Austin, Texas 78714-9347. by Phone: (512) 776-2150 or 1-888-963-7111, ext. 2150; TDD 1-800-735-2989. by E-mail: Customer Service. For more information about the customer service information and complaints process see Compact with Texans.