The unprecedented movement of Earth causes many of deadliest natural disasters like Earthquakes, Tsunamis, there are some most dangerous natural disasters on Earth accroding to most websites on Google, it shows that top five dangerous disasters are earthquake, hurricanes, tsunamis, lightening and tornadoes.
"Massive plates fit together like puzzle pieces deep beneath the Earth. When a plate shifts along one of the fault lines that join them, a violent upheaval takes place on the planet's surface, experienced by us as an earthquake. Countries as far flung as Iran, Chile, Japan and New Zealand are particularly vulnerable to this seismic activity."(1)
Here are some well known deadliest earthquakes
|1556 Shaanxi earthquake||January 23, 1556||Shaanxi, China||820,000–830,000|
|1976 Tangshan earthquake||July 28, 1976||Hebei, China||242,769|
|1920 Haiyuan earthquake||December 16, 1920||Ningxia–Gansu, China||273,400|
|2004 Indian Ocean earthquake||December 26, 2004||Indian Ocean, Sumatra, Indonesia||230,210+|
|2010 Haiti earthquake||January 12, 2010||Haiti||100,000–316,000|
Why do earthquakes happen?
Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake.(3)
Earthquakes may last only a few seconds or may continue for up to several minutes. They can occur at any time of the day or night and at any time of the year.
"Most earthquakes are too small to affect us. Earthquakes of larger magnitude, however, which release more energy during fault ruptures, can be hazardous, exposing us to the risk of harm or loss." (4)
Intense ground shaking can generate many sources of potential harm or loss. In the natural environment, such hazards include the following:
- Landslides or avalanches.
- Surface faulting, in which the surface of the ground along one side of a fault is displaced horizontally or vertically in relation to the ground on the other side.
- Tsunamis, which can be triggered by earthquake-induced underwater landslides or by surface faulting that occurs on the floor of the ocean.
- Liquefaction, in which loosely packed, water-logged soils temporarily lose strength and stiffness and behave like liquids, causing the ground to sink or slide.
- Flash floods, which can be caused by liquefaction near rivers or lakes.(4)
For my next round of post, I'll be researching on can we predict earthquake?