Earthquakes, also called temblors, can be so tremendously destructive, it’s hard to imagine they occur by the thousands every day around the world, usually in the form of small tremors.
Some 80 percent of all the planet's earthquakes occur along the rim of the Pacific Ocean, called the "Ring of Fire" because of the preponderance of volcanic activity there as well. Most earthquakes occur at fault zones, where tectonic plates—giant rock slabs that make up the Earth's upper layer—collide or slide against each other. These impacts are usually gradual and unnoticeable on the surface; however, immense stress can build up between plates. When this stress is released quickly, it sends massive vibrations, called seismic waves, often hundreds of miles through the rock and up to the surface. Other quakes can occur far from faults zones when plates are stretched or squeezed.
Scientists assign a magnitude rating to earthquakes based on the strength and duration of their seismic waves. A quake measuring 3 to 5 is considered minor or light; 5 to 7 is moderate to strong; 7 to 8 is major; and 8 or more is great.
On average, a magnitude 8 quake strikes somewhere every year and some 10,000 people die in earthquakes annually. Collapsing buildings claim by far the majority of lives, but the destruction is often compounded by mud slides, fires, floods, or tsunamis. Smaller temblors that usually occur in the days following a large earthquake can complicate rescue efforts and cause further death and destruction.
Loss of life can be avoided through emergency planning, education, and the construction of buildings that sway rather than break under the stress of an earthquake.
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Victoria Falls is one of the seven natural wonders of the world. 1. Explore the falls About two-thirds of the Victoria Falls frontage is on the Zimbabwean side and most of the Falls plunges down this section. Walk around and make your way through lush rainforest before emerging on to 16 viewpoints along the gorge edge, starting with the one with a statue of David Livingstone on the western edge of the chasm, before passing the thundering Devil’s Cataract and the Main Falls. Danger Point is the last point on the path from where you can take a path to the right for a view of the Victoria Falls Bridge, where you may even see some bungee jumpers. More »CNTraveller - Mon 25 Nov, 2013 4:22 PM IST