What are the common 10 natural disasters on the earth?

Top9: avalanche.

Top8: Drought.

Top7: Wildfire.

Top6: flood.

Top5: Tsunami.

Top4: Volcanic eruption.

Top3: Tornado.

Top2: Earthquake.

Top 1: hurricane.

Tenth place, landslide. Landslides are disasters involving ground factors, including rocks, trees, some houses and any other substances that may be washed away. Landslides may be caused by earthquakes, volcanic eruptions or general instability in the surrounding areas. Debris flow or debris flow is a special case of landslide, and a large area of heavy rain makes loose soil on steep slope collapse and slide down.

Ninth place, avalanche. Avalanche is a geophysical disaster, which involves a large piece of snow or rock sliding down a hillside. When materials accumulate on slopes, this is one of the main dangers in winter. When avalanches move down, they may cause snow in the snow bag and increase its volume.

Eighth place, drought. When there is a serious shortage of water supply in an area, the drought will last for months or years. Under normal circumstances, when the regional rainfall continues to be below the average level, this situation will occur, which will have a significant impact on the ecosystem and agriculture in the affected areas.

Seventh place, wildfire. Generally speaking, forest fires, wildfires or forest fires are uncontrolled fires burning in wild areas. Common causes include lightning, human carelessness, arson, volcanic eruption and volcanic ash. This may be a threat to rural areas and wildlife.

Sixth place, flood. Flood is the flooding of water that floods the earth, usually because the water in a river or lake exceeds the total capacity of the body, and the water breaks through the dam and instantly forms a huge flow. It is also possible that urban sewers are paralyzed and rainwater accumulates because of rainfall.

Fifth place, tsunami. Tsunami is a series of waves produced when a group of water (such as ocean) moves rapidly. Earthquakes, large-scale movements above or below the water surface, volcanic eruptions and other underwater explosions, landslides, the influence of large meteorites on comets, and nuclear weapons tests at sea may all trigger tsunamis.

Fourth place, volcanic eruption. Volcanic eruption is a manifestation of volcanic activity, releasing lava and toxic gases into the air. They range from daily small volcanic eruptions to very rare super volcanic eruptions (at least 1 1,000 cubic kilometers of volcanic eruptions), and the erupting volcanic ash and other substances form pyroclastic flows, which are comparable in scale to passenger planes.

Third place, tornado. Tornadoes are violent, swirling columns of air that blow at speeds of 50 to 300 miles per hour, or even faster. Tornadoes either form alone or develop into more violent large-scale tornadoes or other large-scale thunderstorms.

Second place, earthquake. Earthquakes are the result of the sudden release of energy in the earth's crust, and seismic recorders are also called seismographs. The magnitude of an earthquake is usually expressed by the Richter scale. Earthquakes below magnitude 3 are almost imperceptible, and earthquakes of magnitude 7 cause serious damage in a large area. On the earth's surface, earthquakes appear as vibrations and sometimes ground movements.

First place, hurricane. Hurricanes, also known as typhoons, are caused by evaporated water in the ocean and become storms. The Coriolis effect causes the storm to rotate. When the wind speed with high wind speed reaches more than 74 miles per hour, it will be declared as a hurricane. Hurricanes are used for these phenomena in the Atlantic Ocean and the Eastern Pacific Ocean, while tropical cyclones in India and the Western Pacific Ocean are called typhoons.