Please enable JavaScript.
Coggle requires JavaScript to display documents.
natural disasters - Coggle Diagram
natural disasters
Landslides
Landslides is a geological activity in which falling of rocks and soil occur down a slope of land. Heavy rains, small earthquakes , volcano eruptions and of course the gravitational force are the driving forces of landslide. The human activities like mining, construction and quarrying also cause landsliding. The movement of soil away from the actual foundation, sudden decrease in ground water level and cracking of ground are indication of landslides.
-
Lightning
Lightning is natural formation of electricity and flows through air like a flash. Due to the collision between ice gained cloud formation of charges will take place at beneath of clouds, once charge concentrate at any point on earth a sudden flow of electricity will pass. It can be mountains, trees, animals or humans. Lightning have temperature up to 54000 degree Fahrenheit, approximately six times hotter than surface of Sun.
-
Volcanic eruptions
Volcanoes are actually an opening from the inner part of Earth to the surface. Volcanic eruption emerges ashes, hot lava and poisonous gases. The convergence and divergence of tectonic plates under Earth which causes the formation of volcanoes. Mainly volcanoes are found in mid Atlantic and pacific ridge.
-
Hurricanes
Hurricanes are powerful rapidly rotating storm system mainly hit over tropical seas. Hurricanes are also called as typhoon, cyclone collectively known as tropical cyclones. Hurricanes will spread across 600 miles rotate inward and upward at 70 to 200 miles per hour speed.
-
Tornadoes
Tornadoes are strong, violently rotating air storm initiate from clouds to surface of earth. Some violent tornadoes achieve wind speed up to 300 miles per hour. Tornadoes are normally found in condensation funnel shape, also holds several shape depending on pressure of air. The thunder storms, mixing up of cold, moist air with hot air makes instability and violent tornadoes will form
-
Tsunamis
Tsunamis or tidal waves formed due to the Earthquakes, volcanic eruption or other form of disturbance in oceans. Tsunami tides have heights of hundreds of meters and large wavelength. Such tidal waves will travel thousands of miles and mainly hits coastal areas. Tsunamis have greater speed at deep water in ocean. The speed decreases as it approaches coastal areas but have greater height. The retrieval of waves is the main indication of Tsunamis
-
Earthquakes
Earthquakes are one of the most dangerous disasters ever faced by the human. Earth’s surface holds number of plates called tectonic. Such plates have rough edges and they always keep moving and slide over each other.
-
