A powerful magnitude-7.7 earthquake struck off the northern coast of Indonesia's Flores Island before dawn on Saturday, killing at least 20 people, triggering a tsunami warning that authorities lifted roughly three hours later, and leaving rescue teams still unable to reach the district closest to the epicenter.
The quake struck at 5:58 a.m. local time, with an epicenter about 68 kilometers north-northwest of Ende, the largest city on Flores's southern coast, in Indonesia's East Nusa Tenggara province. The U.S. Geological Survey put the depth at a shallow 10 kilometers, the kind of near-surface rupture that tends to produce the most violent shaking. Three aftershocks followed within half an hour — magnitude 5.9, 5.6 and 6.1 — and Indonesia's geophysics agency warned more could follow for days.
Indonesia's meteorological, climatological and geophysics agency issued a tsunami warning for coastlines around the Flores Sea immediately after the quake, urging residents to move away from beaches and low-lying ground. It lifted the warning about three hours later after tide gauges recorded only modest wave activity — under one meter — in the Maurole and Ende areas, short of the surge officials had initially feared.
Rescuers cut off from the district nearest the epicenter
The clearest picture of the damage so far has come from around the port town of Maumere, where rescue crews reported finding 20 dead and six injured, with two more people still trapped under collapsed rubble as of Saturday. Collapsed buildings, damaged warehouses and downed power lines were reported across the wider region, and officials said outages had knocked out phone and internet service in some of the hardest-hit areas, slowing the flow of information from the ground.
That blackout is most acute in Nagekeo regency, the district that sits closest to the epicenter, which emergency teams had not yet been able to reach by Saturday. Roughly 2,000 residents were evacuated from the regency, but officials cautioned that the casualty figures reported so far reflect only the areas rescuers have managed to get to — meaning the toll of at least 20 dead is likely to rise once teams reach Nagekeo and assess the damage there directly. Earlier in the day, as reports trickled in from different agencies, some outlets cited far lower tolls of two or five dead while others cited figures as high as several dozen; the count of at least 20, corroborated by multiple rescue agencies and news organizations by Saturday afternoon, is the most current and most widely confirmed figure.
The USGS estimated that more than half a million people on Flores likely experienced very strong shaking, with moderate to strong tremors felt by several million more across the wider Nusa Tenggara island chain and beyond.
A region still shadowed by 1992
Flores sits on one of the most seismically active stretches of the Pacific "Ring of Fire," where the Indo-Australian plate grinds beneath the Sunda plate, and the island has a violent history with the sea it depends on. A 1992 earthquake and tsunami in almost the same waters killed more than 2,500 people, a disaster still cited by Indonesian officials as the benchmark for how quickly a shallow quake in this stretch of the Flores Sea can turn catastrophic — and why authorities moved immediately to issue Saturday's warning even before the scale of onshore damage was clear.
Officials said rescue teams were prioritizing routes into Nagekeo regency but had been slowed by blocked roads and the communications outage, with aerial surveys planned once conditions allowed.
Indonesian disaster-response officials, cited by wire and broadcast reporting Saturday
President Prabowo Subianto's government has mobilized national disaster agency personnel, along with military and police units, to Flores, and Indonesia's health ministry said mobile medical teams were being dispatched to Ende and Maumere to treat the injured and support hospitals that officials said were already stretched. Ships and aircraft carrying additional relief supplies and search-and-rescue equipment were being organized from Kupang, the provincial capital, and from Bali.
Indonesia, an archipelago of more than 17,000 islands straddling several tectonic boundaries, is among the most disaster-prone countries on Earth; earthquakes, volcanic eruptions and tsunamis are recurring hazards, most catastrophically in the 2004 Indian Ocean tsunami that killed roughly 230,000 people across the region, more than 160,000 of them in Indonesia's Aceh province. Saturday's quake, while far smaller in scale, immediately revived the same emergency machinery — tsunami sirens, beach evacuations and a national disaster response — that Indonesia has built in the two decades since.
For now, officials in Jakarta say the priority is simply reaching Nagekeo. Until rescue teams get there and restore communications, disaster agency spokespeople have said, no one can say with confidence how high the final toll from Saturday's quake will climb.
