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Question
What is the difference between seismic focus and epicenter?
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Solution
| Seismic Focus | Epicenter |
| The point inside the Earth where the earthquake originates and where the seismic waves are first generated. | The point on the Earth’s surface directly above the seismic focus. |
| Also called the hypocentre. | Located at the surface above the focus. |
| Located beneath the surface, often at a depth of 8 to 35 km. | Lies on the Earth’s surface, directly above the seismic focus. |
| Seismic waves radiate outward from this point. | Earthquake tremors are often felt most strongly near the epicentre. |
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