Some of the things that happen after an earthquake include loss of lives and destruction of property. It also results to gorges and valleys that were not present. Earthquakes mainly take place along the border between the tectonic plates.
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After an earthquake, apart from large buildings being crumpled on the ground, there could be large fissures in the ground. Sandy soil can become liquid causing the ground to sink and small hills can disappear. You can find more information here: http://www.pitara.com/discover/5wh/online.asp?story=123