Focus vs. Epicenter — What's the Difference?

The centre of interest or activity

The epicenter, epicentre () or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates.

The state or quality of having or producing clear visual definition

The point on the earth's surface directly above the focus of an earthquake.

One of the fixed points from which the distances to any point of a given curve, such as an ellipse or parabola, are connected by a linear relation.

The focal point of a usually harmful or unpleasant phenomenon or event; the center

An element of a sentence that is given prominence by intonational or other means.

(American spelling) epicentre

Adapt to the prevailing level of light and become able to see clearly

(American spelling) epicentre

Pay particular attention to

The point on the Earth's surface directly above the focus of an earthquake

Place the focus on (an element of a sentence).

The distinctness or clarity of an image rendered by an optical system.

The state of maximum distinctness or clarity of such an image

An apparatus used to adjust the focal length of an optical system in order to make an image distinct or clear

A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system

See focal length.

A center of interest or activity

Close or narrow attention; concentration

A condition in which something can be clearly apprehended or perceived

(Medicine) The region of a localized bodily infection or disease.

(Geology) The point of origin of an earthquake.

(Mathematics) A fixed point whose relationship with a directrix determines a conic section.

To cause (light rays, for example) to converge on or toward a central point; concentrate.

To render (an object or image) in clear outline or sharp detail by adjustment of one's vision or an optical device; bring into focus.

To adjust (a lens, for example) to produce a clear image.

To direct toward a particular point or purpose

To converge on or toward a central point of focus; be focused.

To adjust one's vision or an optical device so as to render a clear, distinct image.

To concentrate attention or energy

A point at which reflected or refracted rays of light converge.

A point of a conic at which rays reflected from a curve or surface converge.

The fact of the convergence of light on the photographic medium.

The quality of the convergence of light on the photographic medium.

(uncountable) Concentration of attention.

The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).

(GUI) The status of being the currently active element in a user interface, often indicated by a visual highlight.

(linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.

An object used in casting a magic spell.

To concentrate during a task.

(transitive) To direct attention, effort, or energy to a particular audience or task.

(transitive) To cause (rays of light, etc) to converge at a single point.

(transitive) To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.

(intransitive) To concentrate one’s attention.

To transfer the input focus to (a visual element), so that it receives subsequent input.

To aggregate figures of accounts.

A point in which the rays of light meet, after being reflected or refracted, and at which the image is formed; as, the focus of a lens or mirror.

A point so related to a conic section and certain straight line called the directrix that the ratio of the distance between any point of the curve and the focus to the distance of the same point from the directrix is constant.

A central point; a point of concentration.

To bring to a focus; to focalize; as, to focus a camera.

The concentration of attention or energy on something;

Maximum clarity or distinctness of an image rendered by an optical system;

Maximum clarity or distinctness of an idea;

A central point or locus of an infection in an organism;

Special emphasis attached to something;

A point of convergence of light (or other radiation) or a point from which it diverges

A fixed reference point on the concave side of a conic section

Direct one's attention on something;

Cause to converge on or toward a central point;

Bring into focus or alignment; to converge or cause to converge; of ideas or emotions

Become focussed or come into focus;

Put (an image) into focus;