With reference to earthquakes, which of the following statements are correct?
- 1. Earthquakes largely occur along the converging plate boundaries.
- 2. Point of origin of earthquake in lithosphere is known as focus/hypocentre.
- 3. Intensity of earthquake decreases with distance from the epicentre.
- 4. Epicentre of earthquake always remains over continents only.
Select the correct answer using the code given below.
1 and 2 only
1, 2 and 3
2 and 3 only
1 and 4
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Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2016
2. The focus (or hypocentre) is the exact point within the Earth’s lithosphere where the seismic rupture originates.
3. The intensity of ground shaking and damage caused by an earthquake typically decreases as distance from the epicentre (the point on the surface directly above the focus) increases, as seismic waves lose energy as they travel.
4. Earthquakes occur in both continental and oceanic lithosphere. The epicentre can be located anywhere on the Earth’s surface, including over oceans (e.g., associated with mid-ocean ridges, oceanic trenches, or transform faults in oceanic crust).