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UPSC Geography 07 - Earthquakes

This Post and the attached video will explain the following points of Micro-Notes on UPSC Geography 07 - Earthquakes. Copy & Note it down carefully, as it will be very useful in Fast Revision of the entire topic of "UPSC Geography 07 - Earthquakes".

UPSC Geography 07 - Earthquakes


John Milne

  • Seismology 
  • John Milne aks Earthquake Milne - Milne Instrument 1880’s
Reasons of Earthquakes

  • Epirogenic Activity- Horizontal Movement of earth plates
  • Divergent, Convergent,Transformational movements
  • Valdivia (chile)-9.5 (1960)

Earthquake Waves
  • P (Longitudinal)-S (Body waves-Transverse)
  • L-R Waves (Surface Waves)
  • P pass through Core but get deflected
  • Shadow zone 105-140 deg
  • Epicenter
  • Focus- 100 km (90%)

Different Scales
  • Richter scale-1935 by Charles F. Richter 
  • Wave Size 10 Times
  • ENERGY of a quake goes up by a factor of 31.6 as per (10^n)^3/2 for each factor of 1 & 100 times with factor2
  • MSK Scale -64 (XI)
  • Moment Magnitude Scale by hanks

Earthquake Zones in India
  • 2-5 Zone Earlier
  • 1-4 Zone revised
  • isoseismals, lines joining places with equal seismic intensity

Impact of Earthquakes – Liquefaction







** Above Video is created by KapsOne Studies and Placement Center, Nagpur for Guidance of UPSC Civil Service (IAS /IPS / IFS / IRS / SSC / Railways / NDA), MPSC Rajyaseva, UPPSC, MPPSC, BPSC, RPSC, NCERT Aspirants on UPSC Geography 07 - Earthquakes.
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