7.7 Magnitude Earthquake Strikes Offshore Flores, Indonesia; Tsunami Status Unconfirmed

A magnitude 7.7 earthquake struck 68 kilometers (42 miles) north-northwest of Ende, Indonesia, at 21:58:21 UTC on Friday, according to the U.S. Geological Survey, which said the quake was shallow, at a depth of 10 kilometers (6.21 miles).

The size and shallow depth of the undersea quake would typically trigger rapid tsunami evaluation by warning agencies, because earthquakes of that kind can displace the seafloor and generate dangerous waves. But as of 22:22 UTC, no verified public bulletin from Indonesia’s Meteorology, Climatology and Geophysics Agency, known as BMKG, or from the Pacific Tsunami Warning Center system visible on tsunami.gov had been located in the reviewed material. The same review found no verified public reports from BMKG, Indonesia’s disaster-response agency BNPB, or major wire services on casualties, damage, evacuations, measured tsunami heights or aftershock impacts.

USGS placed the epicenter at 8.310 degrees south latitude and 121.352 degrees east longitude. Ende is a town on Flores island in eastern Indonesia, a part of the archipelago that sits in one of the country’s most earthquake-prone regions.

The Flores area lies in the Sunda-Banda transition, where interacting tectonic plates and local thrust faults can produce large shallow earthquakes. That setting has made the region vulnerable to destructive shaking and tsunami-generating events. The most notable precedent is the 1992 Flores earthquake and tsunami, a roughly similar-magnitude disaster that caused severe loss of life. More recently, a 2021 earthquake near Flores, about magnitude 7.3, prompted tsunami warnings and caused injuries and damage, underscoring the area’s continuing hazard.

Because the quake struck offshore and at shallow depth, its location and magnitude are likely to draw immediate scrutiny from emergency and monitoring agencies. Still, the early public picture remained limited late Friday, with no verified official details yet located on whether coastal warnings had been issued, whether tsunami effects had been observed, or whether communities on Flores or nearby islands had suffered damage.

Further official assessments from BMKG, which handles Indonesia’s earthquake and tsunami monitoring, and BNPB, the country’s national disaster agency, were expected to clarify tsunami status and any human impact.