[Mission 2023] INSIGHTS DAILY CURRENT AFFAIRS + PIB SUMMARY 23 June 2022 – PuuchoIAS


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Syllabus- Earthquake

 

Context:

Deadliest Afghanistan quake in decades kills over 1,000 people. The quake originated near the city of Khost, which is close to the country’s border with Pakistan and about 160 kilometres (100 miles) south of the Afghan capital, Kabul.

 

Current Affairs

 

Why does Earthquake happen?

The tectonic movements

These are large, thin plates that comprise the Earth’s crust and the upper mantle (commonly called the “lithosphere”) and are constantly moving. Earthquakes occur along fault lines, cracks in Earth’s crust where tectonic plates meet. They occur where plates are subducting, spreading, slipping, or colliding.

                      Current Affairs  The earthquake starts at the focus, with slip continuing along the fault. The earthquake is over when the fault stops moving. Seismic waves are generated throughout the earthquake

 

Current Affairs

 What caused the quake in Afghanistan?

Hindu Kush geography

  • Afghanistan is earthquake-prone because it’s located in the mountainous Hindu Kush region, which is part of the Alpide belt — the second most seismically active region in the world after the Pacific Ring of Fire.
  • Slow collisions between the Indian subcontinent and the Eurasian tectonic plate are thought to be the cause of the extremely-common earthquakes in this region.
  • The United States Geological Survey (USGS) has called the Hindu Kush region “one of the most seismically hazardous regions on earth”, boasting one of the highest rates of deep earthquakes in the world.

 

Current Affairs

 

Seismic events of this nature can cause enormous devastation in places such as Afghanistan, where infrastructure is weak and people live in remote mountain villages that are difficult for emergency rescuers to reach.

 

Insta Links

Basics: Earthquakes

 

Practice Questions

 Q. Which of the following earthquake waves is first recorded on the Seismograph?

(a) P-waves
(b) Rayleigh waves
(c) S-waves
(d) Love waves

 

Answer: (a)

 

 Q. Discuss the factors that cause earthquakes. Why are Earthquakes more common in certain parts of the world than in others? (250 words)

 

 Source: The Hindu

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