TNPSC Thervupettagam

Megaquake advisory

August 15 , 2024 101 days 204 0
  • After a 7.1-magnitude earthquake shook the southern Japan, the country’s meteorological agency issued its first-ever “megaquake advisory”.
  • The warning said the likelihood of strong shaking and large tsunamis is higher than normal on the Nankai Trough.
  • Nankai Trough is a 900 km long subduction zone along Japan’s southwest Pacific coast.
  • The trough has produced large earthquakes roughly every 100 to 150 years.
  • These tremors usually come in pairs, with the second often rupturing in the subsequent two years.
  • The most recent “twin” earthquakes took place in 1944 and 1946.
  • This advisory by the Japan’s meteorological agency was just a warning not a prediction.

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