What do you understand by an earthquake swarm? Elaborate the reasons behind the earthquake swarms being witnessed across India.
Answer: Earthquake swarms typically refer to a cluster of moderate earthquakes that occur over a period of hours to days without a distinct main shock. When seismic energy piles up inside the Earth and is released in small amounts from certain points, such a series of earthquakes can occur.
Earthquake swarms in India
- In India, sequences of low-intensity quakes are common in areas that have been hit previously. E.g. Saurashtra in Gujarat, Koyna in Maharashtra.
- Many major earthquakes in the region have been preceded by earthquake swarm activity as foreshocks. E.g. Latur and Koyna earthquakes in 1993 and 1967 ....
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