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Where is an earthquake epicenter?

The epicenter is the point on the earth’s surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins.

Why is the location of an earthquake usually referred to as the Epicentre?

The earthquake epicentre is the point on the earth’s surface vertically above the hypocentre. The earthquake depth is usually taken as that of the hypocentre, even if the fault ruptures to the surface. The centroid of an earthquake is located at the centre of energy release, usually near the centre of the rupture area.

What is the relationship between an earthquake focus and epicenter?

The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus.

What is the difference between magnitude and intensity of an earthquake?

Intensity: The severity of earthquake shaking is assessed using a descriptive scale – the Modified Mercalli Intensity Scale. Magnitude: Earthquake size is a quantitative measure of the size of the earthquake at its source.

How do they measure earthquake magnitude?

The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. Adjustments are included for the variation in the distance between the various seismographs and the epicenter of the earthquakes.

What does each magnitude earthquake feel like?

A large earthquake far away will feel like a gentle bump followed several seconds later by stronger rolling shaking that may feel like sharp shaking for a little while. A small earthquake nearby will feel like a small sharp jolt followed by a few stronger sharp shakes that pass quickly.

What magnitude earthquake can you feel?

Magnitude Earthquake Effects Estimated Number Each Year
2.5 or less Usually not felt, but can be recorded by seismograph. 900,000
2.5 to 5.4 Often felt, but only causes minor damage. 30,000
5.5 to 6.0 Slight damage to buildings and other structures. 500
6.1 to 6.9 May cause a lot of damage in very populated areas. 100