7.7-Magnitude Earthquake Off Indonesia Triggers Tsunami Warning

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7.7-Magnitude Earthquake Off Indonesia Triggers Tsunami Warning

David Okafor
David Okafor· AI Specialist Author
Updated: August 15, 2026
A 7.7-magnitude earthquake struck off Flores island in Indonesia on Saturday, prompting a tsunami warning and evacuations. USGS also reported a 5.1 quake in the same region and a minor tremor in Alaska.
What to watch next: Authorities continue to monitor the situation following the quake and aftershocks.

7.7-Magnitude Earthquake Off Indonesia Triggers Tsunami Warning

Major Quake Strikes Off Indonesia

A 7.7-magnitude earthquake struck off the north coast of Flores island in eastern Indonesia, triggering a tsunami warning and prompting hundreds of people to evacuate. [4] The main quake and its aftershocks led to a tsunami warning being issued. [4] Indonesian authorities and the US Geological Survey confirmed the 7.7 magnitude. [5] The shallow quake's epicenter was located about 68 km northwest of Ende on Flores island, between Bali and East Timor. [4]

Epicenter and Seismic Details

The epicentre of the shallow quake was located off the north coast of the island, about 68km northwest of Ende. [4] Indonesian authorities and the US Geological Survey confirmed the 7.7 magnitude. [5] The shallow quake's epicenter was located about 68 km northwest of Ende on Flores island, between Bali and East Timor. [4]

Related Tremors in Indonesia and Alaska

A separate M5.1 earthquake occurred 49 km north of Ruteng, Indonesia, at a depth of 10.0 km. [3] A minor M2.6 earthquake was recorded 2 km east of Port Lions, Alaska, at a depth of 37.1 km. [2] The main quake and its aftershocks led to a tsunami warning being issued. [4]

Tsunami Warning and Evacuations

A strong 7.7-magnitude earthquake struck off Flores island in eastern Indonesia on Saturday, the US Geological Survey and Indonesian authorities said, triggering a tsunami warning and prompting hundreds to evacuate. [4] The main quake and its aftershocks led to a tsunami warning being issued. [4] Indonesian authorities and the US Geological Survey confirmed the 7.7 magnitude. [5]

Regional Context

The Indonesian island of Flores, between Bali and East Timor, was near the epicentre of the 7.7 earthquake. [4] A strong 7.7-magnitude earthquake struck off Flores island in eastern Indonesia on Saturday, the US Geological Survey and Indonesian authorities said, triggering a tsunami warning and prompting hundreds to evacuate. [4] The epicentre of the shallow quake was located off the north coast of the island, about 68km northwest of Ende. [4]

What to watch next: Authorities continue to monitor the situation following the quake and aftershocks.

Further Reading

Editorial process: This article was synthesized from the original sources cited above using The World Now's AI editorial system, with byline accountability from our editorial team. We grade every story for source grounding, factual coherence, and on-topic match before publication. Read more about our editorial standards and contributors. Spot something inaccurate? Let us know.

Last updated: August 15, 2026

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