Texas is a state located in the southern center of the United States. It limits to the north with Oklahoma, to the northeast with Arkansas, to the east with Louisiana, to the southeast with the Gulf of Mexico, to the southwest with Mexico and to the west with the state of New Mexico.
Seismometers are tools which measure motion in the ground including seismic waves generated by earthquakes, volcanoes, and other activities which might create seismic waves. Seismometers measure any movement of seismic activity in the earth and today this is done by electronic means whereby the machine measures any changes in seismic activity in the surrounding areas of the seismometer. The first seismometer is believed to have been invented by Zhang Heng of China's Han Dynasty in 132 AD.
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Relative location is a description of how a place is related to other places. For example, the Empire State Building is 365 kilometers (227 miles) north of the White House in Washington, D.C. It is also about 15 blocks from New York's Central Park. These are just two of the building's relative locations
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Caucasus Mountains separates Europe from SouthWest Asia.
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Caucasus is mountain range that streches between Blask Sea and Caspian Sea in west-east direction. This range is politically located in parts of Russia, Georgia, Azerbaijan and Armenia. It's highest point is Elbrus (5,642 m).
Caucasus is natural border between Asia and Europe. To the west border between mentioned continents runs over <em>Black Sea</em>, and in the opposite direction, over <em>Caspian Sea</em>.
Further to the west Europe and Asia are divided by <em>Bosphorus</em>, <em>Sea of Marmara</em> and <em>Dardanelles</em>.
