GENERAL GEOLOGY

Detailed explanation-1: -The point where an earthquake originates is called the seismic focus. It is also known as hypocenter.

Detailed explanation-2: -The spot underground where the rock first breaks is called the focus, or hypocenter of the earthquake. The place right above the focus (at the ground surface) is called the epicenter of the earthquake. Cutaway view of the reverse fault. The earthquake starts at the focus, with slip continuing along the fault.

Detailed explanation-3: -The point where the earthquake originates is called the seismic focus. The point on the Earth’s surface vertically above the focus is called its epicentre.

Detailed explanation-4: -Shallow-focus earthquakes occur more often than deeper ones; about 75% of the total energy released from earthquakes is from shallow-focus ones. Unfortunately, the shallower an earthquake, the more damage it can produce at the surface; intermediate and deep-focus earthquakes are rarely destructive.