What are the cause of natural disaster?

Answer 1

In no particular order...

1. Thermonuclear activity on the center of the earth.
2. Moving of earth's plate.
3. Human exploration gone wrong.
4. Plague.

same answer more explained.

natural disasters come from 2 main sources.

The sun, and the earths core.

The Earths core heat the earth and allows the tectonic plates to move, it is the colliding up these plates that cause earthquakes and tsunamis, and it is the heat and pressure applied to gaps in these plates that causes volcanic eruption.

BUT what we call disaster are really just signs that the earth is alive.

The sun, creates weather by heating up sections of the earth. It causes water to evaporate to create rain and creates wind the pressure systems. Heat from the sun creates high pressure and high pressure flows to low pressure and it is that flow that we call wind. Tornadoes and hurricanes (cyclones) are cause when two directions of wind flow next to each other causing a spiral, the strength of the wind and the amount of water in the air can cause anything from a small "willy willy" to a full blow cyclone the causes severe waves, wind and rain.

Of course this is a very simplified version of the answer, the full facts are far more complicated.

*Hollering : I am moving everything from the question to the discussion to avoid confusion to sake