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Why can shallow earthquakes generally be more dangerous?

Answer and explanation

Correct answer: Because their focus is near the Earth's surface

The governing concept is focal depth and attenuation of seismic energy. In a shallow earthquake, the focus lies relatively close to the surface, so seismic waves travel a shorter distance before reaching buildings and people. Less distance generally means less weakening, producing stronger ground motion and potentially greater damage. Option A is correct. Shallow earthquakes are not confined to oceans, and their energy is not completely lost before reaching the surface; earthquakes originate within Earth, not in the atmosphere.

Related tags

Shallow EarthquakesFocal DepthSeismic WavesEarthquake Hazards

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