A powerful 7.7-magnitude earthquake struck off the coast of Indonesia early Saturday, triggering a tsunami warning for parts of the country and sending residents in vulnerable coastal areas toward higher ground.
The earthquake hit the Flores region at 5:58 a.m. local time, according to the U.S. Geological Survey (USGS). The agency placed the epicenter about 68 kilometers (42 miles) north-northwest of Ende, on Flores Island, at a depth of 10 kilometers (6.2 miles).
Indonesia’s Meteorology, Climatology and Geophysics Agency (BMKG) also classified the earthquake as magnitude 7.7 and reported a depth of 15 kilometers, with the epicenter located about 30 kilometers northeast of Mbay in Nagekeo, East Nusa Tenggara. Differences in the preliminary location and depth are common as seismic agencies continue to refine their measurements.
Indonesia issued a tsunami warning following the powerful offshore earthquake, urging people in potentially affected coastal areas to stay away from beaches and riverbanks and move to higher ground.
Authorities were monitoring coastal tide gauges for possible changes in sea levels as they assessed the tsunami threat.
The warning is particularly significant because the earthquake occurred offshore and was relatively shallow. Indonesia is highly exposed to tsunami hazards because of its location along several active tectonic boundaries.
The earthquake struck in the Flores region of eastern Indonesia, near the northern coast of Flores Island.
The USGS placed the epicenter 68 kilometers north-northwest of Ende in East Nusa Tenggara province. BMKG’s preliminary location was approximately 30 kilometers northeast of Mbay, in the Nagekeo area.
Ende is one of the main population centers on Flores and lies on the island’s southern coast, while the earthquake was located offshore to the north.
The earthquake was measured at magnitude 7.7, making it a major earthquake capable of producing strong shaking and potentially significant impacts near the epicenter.
The USGS reported that the earthquake resulted from reverse faulting at a shallow depth. The region has a long history of strong earthquakes, reflecting the complex tectonic activity surrounding the Indonesian archipelago.
There were no immediate reports of deaths or significant damage in the first reports following the earthquake.
However, authorities were still assessing the situation, and the information could change as emergency teams reach affected areas and communications improve.
For that reason, casualty and damage figures should be treated as preliminary until Indonesian authorities provide an official assessment.
The 7.7-magnitude earthquake was followed by several strong aftershocks in the same general area.
According to reports citing seismic data, a magnitude 5.9 earthquake struck roughly 15 minutes after the main shock, followed by additional tremors measuring 5.6, 6.1 and 5.5.
The sequence is another reason authorities are urging residents in affected areas to remain alert and follow official emergency instructions.
Indonesia’s tsunami warning covered parts of the country’s eastern and southern regions. BMKG urged people in potentially affected coastal areas to move away from beaches and riverbanks and seek higher ground.
The warning does not mean that a destructive tsunami has been confirmed in every area under alert. Authorities issue warnings based on the earthquake’s characteristics while monitoring tide gauges and other data to determine whether tsunami waves are occurring.
Australia’s tsunami warning center said the earthquake posed no tsunami threat to the Australian mainland, islands or territories.
The assessment is separate from Indonesia’s domestic tsunami warning, which was focused on potentially vulnerable coastal areas closer to the earthquake.
Indonesia sits along the Pacific Ring of Fire, one of the world’s most active zones for earthquakes and volcanic eruptions.
The country’s location near the boundaries of several tectonic plates makes seismic activity common. Indonesia is also an enormous archipelago made up of more than 17,000 islands, stretching across a highly active tectonic region.
The Flores region has experienced destructive earthquakes and tsunamis in the past, underscoring why authorities respond quickly to major offshore earthquakes.
The situation remains developing. The initial magnitude, epicenter and depth reported by seismic agencies can be revised as more data become available.
The USGS currently reports a magnitude of 7.7, a depth of 10 kilometers and an epicenter 68 kilometers north-northwest of Ende. BMKG reports the same magnitude but lists a depth of 15 kilometers and places the epicenter near Mbay in Nagekeo.
Authorities continue to monitor coastal conditions and aftershocks. People in affected areas should rely on official instructions and avoid returning to beaches or other coastal locations while warnings remain in effect.
The earthquake was measured at magnitude 7.7 by the U.S. Geological Survey and Indonesia’s BMKG.
The earthquake struck off the Flores region in East Nusa Tenggara. The USGS placed the epicenter about 68 kilometers north-northwest of Ende, while BMKG located it near Mbay in Nagekeo.
The USGS reported a depth of 10 kilometers, while BMKG’s current data lists 15 kilometers. Because earthquake parameters can be revised, the figures should be attributed to the respective agencies.
Yes. Indonesian authorities issued a tsunami warning and advised residents in potentially affected coastal areas to stay away from beaches and riverbanks and move to higher ground.
There were no immediate reports of casualties or significant damage in the initial coverage. Authorities were continuing to assess the situation.
Yes. Several strong aftershocks followed the main earthquake, including tremors above magnitude 5, according to seismic data reported after the event.
No. Australia’s tsunami warning center said there was no tsunami threat to the Australian mainland, islands or territories from this earthquake.
Indonesia is located along the Pacific Ring of Fire, where several tectonic plates interact. This makes the country particularly vulnerable to earthquakes, volcanic eruptions and related hazards.
Contenido GEC