Event Brief
Magnitude 6.1 earthquake strikes off Sumatra, Indonesia
By The BriefBrief · Sources (2)
Filed: Aug 18, 2026 at 3:10 AM ET
Summary: 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: Aug 18, 2026 at 5:21 AM ET
WHERE: Indonesia
WHY: Cause not yet established.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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