The tectonic plates are part of the lithosphere, which includes the crust and the uppermost mantle. There are two types tectonic plates: Continental crust – found beneath the earth’s continental land masses and under shallow seas close to continents, it is thicker between 30 and 60km but is made of lighter rocks including granite. Tectonic hazards are hazard events caused by tectonic plates colliding into each other, moving against each other, moving apart or subduction between a less dense plate and a more dense plate. Examples of tectonic hazards include: It is most commonly caused by a sudden movement of rocks within the Earth's crust. This occurs mainly at the margins of tectonic plates, where plates are moving and enormous pressures build up and released. What is a Climatic Hazard? Natural processes which are due to the atmosphere-climatic in nature. Immediate and long-term responses to a tectonic hazard. Human response to tectonic hazards can be immediate or long-term. Short-term or immediate responses occur in the days and weeks immediately after a disaster has happened. Natural Hazards: Tectonic Hazards The crust (oceanic and continental) and the upper mantle form a rigid shell at the Earth’s surface known as the lithosphere. It is broken into different fragments, which are called tectonic plates. The meeting of two plates is known as plate margin. • Tectonic hazard - a natural hazard caused by movement of tectonic plates (including volcanoes and earthquakes). • Tectonic plate - a rigid segment of the Earth’s crust which can ‘float’ across the heavier, semi-molten rock below. Continental plates are less dense, but thicker than oceanic plates. Tectonic hazards are geological results of plate shifting exhibited by volcanic eruption, glacial erosion, tsunamis and earthquakes. Earthquakes are the most commonly reported hazards because of the greater likelihood of larger populations along major fault lines than in glacial or oceanic regions. Tectonic hazards do more than cause damage. GCSE Geography Tectonic landscapes and hazards learning resources for adults, children, parents and teachers. Intro- when comparing different tectonic hazard events it can be seen that some can be seen have much larger costs than others, as well as they type of costs varying between different events for a variety of reasons. -One of the main reasons some tectonic hazards are more costly is the physical characteristics of the actual hazard event itself. A magnitude 9.0 earthquake occurred at a destructive subduction margin when the Pacific Plate slipped 50 metres as it collided with the North American Plate. Look at the plate tectonic map above. This movement in the Japan ocean trench caused a sudden uplift of the sea floor, sending a displaced column of water into the air.
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