A powerful 7.7-magnitude earthquake struck eastern Indonesia near Flores Island early Saturday, destroying buildings and killing at least 20 people. Officials issued a tsunami alert that brought coastal evacuations before being canceled hours later as aftershocks continued to rattle the region.
Early Saturday morning on August 15, 2026, a severe undersea earthquake struck the region near Indonesia’s Flores Island. Seismologists measured the magnitude at 7.7, while the U.S. Geological Survey (USGS) placed the shallow hypocenter roughly 10 kilometers beneath the surface. That shallow depth intensified the shaking across East Nusa Tenggara and neighboring areas, where people live.
Casualties and Destruction in Maumere
The heaviest damage concentrated around the port city of Maumere on Flores Island, where local rescue teams reported at least 20 fatalities. Five individuals died in their sleep when their homes collapsed into rubble, according to the governor of East Nusa Tenggara province, Emanuel Melkiades Lake Lene. Rescue workers pulled victims from damaged structures, while at least six people sustained injuries.
Operations remain hampered by blocked access routes. Landslides cut off roads leading to hard-hit areas, forcing emergency responders to rely on maritime routes to reach isolated coastal pockets. Communication lines dropped offline in several localities, leaving authorities unable to gauge the full scope of property damage immediately.
Tsunami Warning and Evacuations in Nagekeo
The violent tremor triggered an immediate tsunami warning across coastal provinces as residents witnessed the sea recede briefly. Indonesian meteorological authorities urged populations in vulnerable sectors to flee toward higher ground. In Nagekeo, approximately 2,000 residents abandoned their homes and moved toward elevated terrain amid widespread panic.
Monitoring stations recorded minor tsunami waves, with maximum heights reaching nearly one meter. Three hours after the initial shock, officials canceled the tsunami alert after sensor readings confirmed no threat of destructive waves remained.
Aftershocks and Ongoing Seismicity on Flores
The main shock unleashed dozens of aftershocks that kept traumatized residents outdoors for hours. The Meteorology, Climatology, and Geophysics Agency (BMKG) logged at least 37 aftershocks within the first hour following the initial tremor, with magnitudes ranging between 3.6 and 6.2. Stronger aftershocks measured 6.1 and 5.9, compounding fears among families reluctant to return to structurally compromised dwellings.
Geologically, the disaster underscores the hazards of the region. Indonesia sits across the Pacific Ring of Fire, a tectonic boundary prone to frequent earthquakes and volcanic eruptions. The same stretch of Flores Island suffered a devastating 7.5-magnitude earthquake and tsunami in 1992 that claimed roughly 2,500 lives.
Foreign Visitors and Local Response
The western end of Flores, anchored by the tourist hub of Labuan Bajo, serves as a gateway for divers visiting Komodo National Park. While panic rippled through tourist accommodations where visitors experienced major seismic activity for the first time, long-term residents reacted with practiced calm, according to a foreign geologist present during the event.
International support mobilized quickly as the European Union activated satellite mapping and emergency assistance to aid recovery efforts. Emergency teams continue searching for people reported missing beneath collapsed buildings, with the death toll expected to shift as rescue workers penetrate remote zones.
