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Event Brief

Magnitude 6.1 earthquake strikes off Sumatra, Indonesia

Indonesia’s geophysics agency says a magnitude 6.1 earthquake struck off Sumatra at a depth of 18 miles.
WHO: Indonesia’s geophysics agency
WHAT: Reported a magnitude 6.1 earthquake struck off Indonesia’s Sumatra island
WHEN: Reported Aug 18, 2026 at 5:21 AM ET
WHERE: Indonesia
WHY: Cause not yet established.

Reporting from 2 identified publishers across this event arc.

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