E-Tools

Summary: Study suggests mega quake could occur at interval shorter than 100 years NHK

- A recent earthquake near Russia’s Kamchatka Peninsula suggests magnitude 9 “megathrust” quakes could occur more frequently than previously thought.
- Researchers found evidence of an “overshoot” phenomenon, where earthquake slip exceeded the equilibrium stress level, releasing strain from prior, unreleased seismic activity.
- This phenomenon poses a potential risk for other areas, including the Nankai Trough, Chishima Trench, and Sagami Trough.
Summary
Kamchatka earthquake suggests magnitude 9 "megathrust" quakes may be more common. Research indicates "overshoot" phenomenon releasing accumulated seismic strain, posing risks to other regions like Nankai & Sagami Troughs. #earthquake #Kamchatka
Reading History
Date Name Words Time WPM
2025/12/21 23:22 Anonymous 62 31s 120
Statistics

62

Words

1

Read Count
Details

ID: afcafc41-4168-4c48-a139-fc78f0bc4f89

Category ID: listed_summary

URL: https://www3.nhk.or.jp/nhkworld/en/news/20251221_12/#summary

Date: Dec. 21, 2025

Notes: 2025-12-21

Created: 2025/12/21 22:40

Updated: 2025/12/21 23:22

Last Read: 2025/12/21 23:22

Actions