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Megaquake advisory
August 15 , 2024
100 days
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- 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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