GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The focus is a point in the interior of Earth where energy is released causing an earthquake. How do the waves generated at the focus move?
A
they stop when they reach the surface
B
they die out before reaching the fault
C
they become stronger in the atmosphere
D
they move out in all directions
Explanation: 

Detailed explanation-1: -The focus of an earthquake is the point where rocks first break along a fault. The epicenter is the point on the earth’s surface directly above the focus. These two parts of an earthquake are located where seismic waves are originated which is produced every time an earthquake takes place.

Detailed explanation-2: -The earthquakes originate in tectonic plate boundary. The focus is point inside the earth where the earthquake started, sometimes called the hypocenter, and the point on the surface of the earth directly above the focus is called the epicenter.

Detailed explanation-3: -The point where an earthquake originates is called the seismic focus. It is also known as hypocenter.

Detailed explanation-4: -During an earthquake, vibrations called seismic waves move out from the focus in all directions. Seismic waves carry the energy of an earthquake away from the focus, through Earth’s interior, and across the surface.

There is 1 question to complete.