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Shallow M6.1 Quake off Northern Sumatra Rattles Simeulue, Triggers No Tsunami Alert

USGS issued a Green alert indicating low expected impact.

Overview

  • The offshore earthquake struck at 04:56 UTC near Simeulue, about 65–66 km southeast of Sinabang, at a depth of roughly 26 km, according to USGS and EMSC.
  • Indonesia’s BMKG and the Pacific Tsunami Warning Center reported no tsunami threat and local authorities began standard monitoring.
  • Residents on Simeulue and parts of Aceh felt strong shaking, with initial reports noting no serious damage or casualties.
  • Some agencies, including India’s National Centre for Seismology, reported the magnitude as 6.2, reflecting routine measurement differences.
  • The quake occurred on the Sunda megathrust in the Pacific Ring of Fire, and officials are watching for aftershocks as assessments continue.