Indonesia Earthquake Tsunami Warning: Indonesia was hit by a powerful magnitude 7.7 earthquake off the coast of Flores in East Nusa Tenggara (NTT) on 15 August 2026. The strong earthquake triggered a tsunami warning and prompted residents in several coastal areas to move toward higher ground.
According to reports citing Indonesia’s Meteorology, Climatology and Geophysics Agency (BMKG), the earthquake occurred at around 5:58 a.m. local time near the Nagekeo area. The quake was shallow and produced strong shaking across parts of eastern Indonesia.
Tsunami Warning Was Issued
Following the earthquake, BMKG issued a tsunami early warning for vulnerable coastal areas. Residents were advised to stay away from beaches and move to safer, higher locations.
Small tsunami waves were subsequently observed at several locations. Reports said the waves were less than one metre, demonstrating why authorities treated the earthquake as a potential tsunami-producing event.
Tsunami Warning Later Lifted
The tsunami warning did not remain active. BMKG officially ended the tsunami early warning at approximately 7:30 a.m. WIB on 15 August, after monitoring sea-level observations and determining that the immediate tsunami threat had passed.
Therefore, the August 15 tsunami warning should not be described as an active warning today. However, earthquake and aftershock monitoring continued after the main event.
Heavy Damage and Casualties
The earthquake caused significant damage in eastern Indonesia. Rescue teams faced difficult conditions because landslides and damaged infrastructure affected access to some communities.
By 24 August 2026, Indonesia’s disaster authorities reported that the death toll had reached 100. More than 73,000 homes were affected, while approximately 180,000 people were displaced, according to Reuters.
The disaster also generated thousands of aftershocks, adding to concerns among residents and emergency responders.
Aftershocks Continue
After a major earthquake of this size, aftershocks can continue for days or weeks. A magnitude 5.9 earthquake was reported in the Flores region on 20 August 2026, according to the European-Mediterranean Seismological Centre as reported by Reuters.
BMKG has continued monitoring seismic activity and advising people to follow official information rather than unverified social-media reports.
What Should People Do During a Tsunami Warning?
People living near the coast should take a tsunami warning seriously. If a strong or long-lasting earthquake is felt, residents should not wait for a warning message before moving away from the shoreline when evacuation is appropriate.
Important safety steps include:
- Move quickly to higher ground or an official evacuation area.
- Stay away from beaches, ports and river mouths.
- Do not return to coastal areas until authorities announce that it is safe.
- Avoid damaged buildings because aftershocks can cause further collapses.
- Follow instructions from BMKG, BNPB and local authorities.
- Do not spread unverified information during an emergency.
BMKG’s tsunami early-warning guidance also advises people to leave damaged buildings carefully, watch for fires and gas leaks, avoid dangerous areas and continue listening to official information because aftershocks may occur.
Why Indonesia Experiences So Many Earthquakes
Indonesia lies in one of the world’s most seismically active regions, commonly known as the Pacific Ring of Fire. Several tectonic plates interact around the Indonesian archipelago, producing frequent earthquakes and volcanic activity.
Because many Indonesian communities are located along coastlines, strong offshore earthquakes can create a tsunami risk. This makes early-warning systems, evacuation planning and public awareness especially important.
Current Situation
The tsunami warning issued after the 15 August Flores earthquake was lifted, so it should not be presented as an ongoing tsunami warning. BMKG’s Indonesia Tsunami Early Warning System remains an important source for checking any new earthquake or tsunami alerts.
The affected region, however, continues to deal with the consequences of the earthquake, including damaged homes, displaced residents, rescue operations and aftershocks.
Conclusion
The 7.7-magnitude Flores earthquake of 15 August 2026 was one of the major seismic disasters to affect Indonesia this year. The earthquake triggered a tsunami warning, and small tsunami waves were recorded before the warning was lifted several hours later.
With the death toll reaching 100 by 24 August, the disaster has become a major humanitarian emergency. Authorities continue recovery operations while monitoring aftershocks and providing assistance to affected communities.
For the latest emergency information, readers should rely on official BMKG and Indonesian disaster-management updates rather than unverified social-media posts.