A natural disaster. Earthquake

These are tremors and vibrations of the earth's surface resulting from sudden displacements and ruptures in the earth's crust
what is an earthquake?
definition...
epicenter
focus

He earthquake consists of an epicenter and a focus
The epicenter is a place that is located on the earth's surface perpendicular to the earthquake source.
The focus of the earthquake. the area of occurrence of an underground impact in the thickness of the earth's crust
how it looks like?

For example, the earthquake that occurred on January 12, 2010 in the Republic of Haiti, claimed the lives of 222,000 people
the earthquake brings with it a huge material catastrophe

what to do in case of an earthquake indoors
Turn off all electrical appliances and the kitchen stove
get down on the floor and find a safe place (under the table)
3.stay in a safe area until the end of vibrations and shocks
if you are still hurt, expect the help of rescuers