Event Brief
Study finds Nankai Trough locked zone changes over time
Filed: Jul 23, 2026 at 4:10 AM ET
Summary: A Japanese study says the Nankai Trough locked zone is not permanent and shifts, complicating megaquake forecasts.
WHO: Japanese study reported by Mainichi newspaper
WHAT: The locked zone in the Nankai Trough is found to change over time rather than remain permanent.
WHEN: Jul 23, 2026 at 3:46 AM ET
WHERE: Nankai Trough off Japan’s Pacific coast
WHY: Stress buildup and earthquake forecasting are complicated because the locked zone where plates lock is more fluid than previously believed.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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