Question

define the following term :

(i) Seismic force
(ii) Epicenter
(iii)Focal depth
(iv) Seosmic waves​

Answer 1

Answer:

1) Seismic forces are inertia forces. When any object, such as a building, experiences acceleration, inertia force is generated when its mass resists the acceleration. We experience inertia forces while travelling

2) the point on the earth's surface vertically above the focus of an earthquake is known as epicenter.

3) In seismology, the depth of focus or focal depth refers to the depth at which an earthquake occurs. Earthquakes occurring at a depth of less than 70 km are classified as shallow-focus earthquakes, while those with a focal depth between 70 km and 300 km are commonly termed mid-focus or intermediate-depth earthquakes.

4) Seismic waves are waves of energy that travel through Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.

Explanation:

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Answer 2

Answer:

Seismic forces are inertia forces. When any object, similar as a structure, gests acceleration, inertia force is generated when its mass resists the acceleration. We witness indolence forces while travelling. Especially when standing in a machine or train, any changes in speed( accelerations) beget us to lose our balance and either force us to change our station or to hold on further forcefully.

The center, epicentre in seismology is the point on the Earth's face directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates.

In seismology, the depth of focus or focal depth refers to the depth at which an earthquake occurs. Earthquakes being at a depth of lower than 70 km( 43 mi) are classified as shallow-focus earthquakes, while those with a focal depth between 70 km( 43 mi) and 300 km( 190 mi) are generally nominated mid-focus or intermediate-depth earthquakes. In subduction zones, where aged and colder oceanic crust sinks under another monumental plate,deep- focus earthquakes may do at much lesser depths in the mantle, ranging from 300 km( 190 mi) up to 700 km

Seismic Waves are waves of aural energy that travel through the Earth. They're a result of earthquakes, stormy eruptions, magma movement, large landslides, and large man-made explosions that give out low-frequency aural energy. Seismic swells are studied by seismologists, who record the swells using seismometers, hydrophones(in water), or accelerometers. Seismic waves are distinguished from seismic noise( ambient vibration), which is patient low-breadth vibration arising from a variety of natural and anthropogenic sources.

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