Advertisements
Advertisements
प्रश्न
What is the difference between seismic focus and epicenter?
Advertisements
उत्तर
| 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. |
APPEARS IN
संबंधित प्रश्न
For the formation of a rift valley, which of the following processes should occur in the earth’s crust?
Identify and name the internal movement.
Molten magma is thrown out of the earth’s mantle.
Fill in the blank:
The last of the earthquake waves to arrive on the surface of the earth are ___________ waves.
Match the Columns.
| Column A | Column B |
| 1. Tsunami | (a) The waves that make the inhabitants feel the ground motion. |
| 2. Seismograph | (b) The instrument for measuring the intensity of earthquakes. |
| 3. S-waves | (c) Harbour waves generated by oceanic earthquakes. |
| 4. Richter scale | (d) The point on the earth surface directly above the seismic focus. |
| 5. Epicentre | (e) An instrument for recording the movement of earthquake waves. |
Describe how earthquakes are caused on the surface of the earth.
How is the intensity of an earthquake measured?
Describe the world’s distribution of earthquakes.
Why are earthquakes related to volcanoes?
Answer the following:
A volcanic eruption is one of the main causes of earthquakes.
Give one word for the following :
The surface position immediately above the origin of an earthquake.
The magnitude of an earthquake is measured by ______.
Seismology is the study of ______.
The earthquake is a ______ activity.
In India, the Himalayan region and the ______ valley are prone to earthquakes.
What is the point of the earth’s surface directly above the focus called?
Choose the odd one.
focus, epicenter, vent, seismic waves
