7.7-magnitude earthquake strikes off Indonesia's Flores island, tsunami warning issued
A powerful earthquake of magnitude 7.7 struck off the coast of Flores island in eastern Indonesia early Saturday (August 15, 2026), according to the United States Geological Survey (USGS). The quake occurred at a shallow depth of 10 kilometres, with its epicentre located approximately 68 kilometres northwest of the town of Ende.
The initial tremor was followed by two strong aftershocks in the same region, measuring magnitudes 5.6 and 5.9. Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) issued a tsunami warning, cautioning that waves could be generated by the seismic activity.
Authorities in Indonesia have been monitoring the situation closely. Residents in coastal areas of Flores and nearby islands were advised to remain alert and follow instructions from local disaster management agencies. No immediate reports of casualties or significant damage have been confirmed, but assessments are ongoing.
Indonesia sits on the Pacific Ring of Fire, a horseshoe-shaped belt of intense seismic and volcanic activity that stretches from Japan through Southeast Asia and across the Pacific basin. The region experiences frequent earthquakes and volcanic eruptions due to the movement of tectonic plates. This event is a reminder of the persistent geological hazards facing the archipelago of more than 17,000 islands.
The USGS reported that the earthquake's magnitude was preliminary and could be revised after further analysis. Seismologists are studying the data to understand the fault mechanism and the potential for subsequent tremors.
Neighbouring countries, including Australia and Timor-Leste, are also watching for any tsunami effects, although the warning has been focused on Indonesian coastal areas. The Indian Ocean Tsunami Warning System, which was established after the devastating 2004 tsunami, is coordinating with regional agencies to provide timely information.
Indonesia has improved its disaster preparedness in recent years, with better early warning systems and regular evacuation drills. However, the vast geography and dense coastal populations remain challenges in ensuring public safety.
This earthquake follows a series of moderate tremors that have affected the Indonesian archipelago in recent months. Scientists emphasise that each event is independent, and no direct link can be assumed without detailed study.
The BMKG has not yet issued a formal cancellation of the tsunami warning. People in affected areas have been urged to move to higher ground as a precautionary measure until the all-clear is given.
As the situation develops, official sources will provide further information. Residents and travellers are advised to rely on verified updates from Indonesian authorities and international monitoring agencies.
