what is important facts about earthquake
Answers
I think that the important fact is that it is a sudden vibration and shaking of the earth surface
1. Our earth consists of several tectonic plates. These plates keep moving constantly. As these plates move, huge pressure is generated which create cracks on earth’s surface or crust. This pressure is then released through these cracks. The pressure actually moves through earth in form of waves (seismic waves) that we know as earthquakes.
2. It is not that only tectonic plates’ movements are responsible for earthquakes. Even meteor impacts and volcanic eruptions can cause earthquakes. Even mine tests and nuclear testing can cause earthquakes.
3. Even gravitational pulls of moon and sun cause earthquakes. They actually cause minor tides on earth’s crust. However, these tides are too small to be felt.
4. Millions of earthquakes occur each year. Majority of these are too weak to be recorded. However, NEIC or National Earthquake Information Center records around 20,000 quakes every year of which only 100 or so are capable of causing damage.
5. Interestingly, when earthquake occurs, the shaking ground itself is not responsible for killing people. Collapse of buildings, landslides, avalanches, volcanic eruptions and tsunamis triggered by earthquakes are actually responsible for killing people