Overview
- USGS measured the quake at magnitude 6.6 and about 25 km deep at 04:56 UTC, while Indonesia’s BMKG reported magnitude 6.3 at 10 km.
- The epicentre was offshore near Sinabang by Simeulue Island, shaking felt strongly at 11:56 a.m. local time as residents rushed outside with no immediate reports of damage or casualties.
- The Indian Ocean tsunami service first noted potential risk, then cleared it after reviewing sea-level gauges.
- Authorities are tracking aftershocks and sea-level data, and the USGS issued a Green alert indicating a low likelihood of casualties or significant losses.
- Severe floods, landslides and Cyclone Senyar in North Sumatra have killed at least 28 people and cut roads and communications, complicating access and assessments.