Earthquakes are caused by disturbances in the interior of the earth and other causes tectonic movements: the disturbances inside the earth are called tectonic movements these forces bring about changes on the earth surface and physical features like mountains, plateaus and rift valleys are formed. The effects of an earthquake range from mild to severe and include structural damage, damaged gas lines, tidal waves, fires, avalanches and flooding the amount of damage an earthquake can cause depends greatly on the size of the earthquake the 1994 earthquake in northridge, california was a.
This causes earthquakes such as the koyna earthquake in maharashtra the shock waves through rocks set up by the underground testing of atom bombs or hydrogen bombs may be severe to cause earthquake effects of earthquake destructive effects: earthquake causes dismantling of buildings, bridge and other structures at or near epicenter.
Earthquakes may cause landslips to dam rivers, which collapse and cause floods  the terrain below the sarez lake in tajikistan is in danger of catastrophic flood if the landslide dam formed by the earthquake, known as the usoi dam , were to fail during a future earthquake.
1 earthquakes-causes and effects prof d chandrasekharam department of earth sciences head, centre of studies in resources engineering indian institute of technology bombay. Earthquakes are recorded by instruments called seismographs the recording they make is called a seismogram (figure 4) the seismograph has a base that sets firmly in the ground, and a heavy weight that hangs free when an earthquake causes the ground to shake, the base of the seismograph shakes too, but the hanging weight does not.
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