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What defines an “earthquake swarm”? Elucidate the recent occurrence of an “earthquake swarm” in Iceland, located on the Mid-Atlantic Ridge.

Topic: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity

Q1. What defines an “earthquake swarm”? Elucidate the recent occurrence of an “earthquake swarm” in Iceland, located on the Mid-Atlantic Ridge. (10M)

Reference: Indian Express

Why the question:

Thousands of earthquakes are shaking Iceland, raising concerns of an imminent volcanic eruption.

Key Demand of the question:

Explain the concept of earthquake swarms and explain its occurrence in the context of Iceland.

Directive:

Elucidate” means to explain or clarify a concept or idea in a clear and detailed manner.

Structure of the answer:

Introduction:

Define Earthquake swarms.

Body:

Discuss the concept in general – Earthquake swarms are a sequence of mostly small earthquakes with no identifiable main shock. Swarms are usually short-lived, but they can continue for days, weeks, or sometimes even months. They are many times too subtle for people to notice. However, it is important to note that they are not aftershocks, which happen after a large main shock.

Next, explain its occurrence in Iceland: The recent earthquake swarm in Iceland, situated on the Mid-Atlantic Ridge, is a series of numerous earthquakes, indicating potential volcanic activity due to the movement of magma beneath the Earth’s surface.

Draw diagrams to illustrate your answer

Conclusion:

Conclude with the need to understand and take measures to overcome their impact.