Indonesia was struck by two powerful earthquakes in 2026, each strong enough to trigger tsunami warnings across its coastal communities, underlining a seismic vulnerability that the country's position on the Pacific Ring of Fire makes unavoidable.
The first earthquake, measuring magnitude 7.4, struck the Molucca Sea at 06:48 local time on April 1, at a depth of 35 kilometres. The epicentre lay roughly midway between the islands of Ternate and Manado. It had been initially recorded at magnitude 7.8 before being revised downward.
One person died — a 70-year-old woman killed by falling building debris in North Sulawesi, according to the BBC. A second person broke their leg jumping from a building in panic. Reports described minor to moderate damage to several houses and a church in the affected area.
Indonesia's Meteorology, Climatology, and Geophysics Agency (BMKG) recorded tsunami waves at five locations following the quake, the highest reaching 0.75 metres at North Minahasa in North Sulawesi, Reuters reported. Around 50 aftershocks followed, the largest measuring magnitude 5.8.
The Pacific Tsunami Warning Center lifted the alert approximately two hours after the quake, stating that "the tsunami threat from this earthquake has now passed," the BBC reported. The Philippines and Malaysia faced no immediate tsunami threat.
The United States Geological Survey (USGS) assessed a low likelihood of significant further casualties and projected limited economic damage, despite the epicentre's proximity to densely populated islands including Ternate and Sulawesi. The full damage picture remained unclear.
Four and a half months later, Indonesia was struck again. On August 14, a magnitude 7.7 earthquake hit near Flores Island in East Nusa Tenggara province, with its epicentre approximately 68 kilometres north-northwest of the city of Ende, CBC News reported. The precise depth of the quake was uncertain, with sources giving conflicting figures of 10 kilometres and 35 kilometres.
At least three aftershocks followed, recorded by the USGS at magnitudes 5.9, 5.6, and 6.1, according to CNN.
The BMKG issued a tsunami warning, advising residents to stay away from beaches and riverbanks and move to higher ground. Witnesses reported that the shoreline near Flores appeared to be receding — a sign that can precede a tsunami wave — and images showed collapsed buildings as residents rushed into the streets. Australia's tsunami warning centre said there was no threat to Australian territory.
No casualties or structural damage were officially confirmed in the immediate aftermath. The USGS estimated that approximately 500,000 people may have experienced very strong or severe shaking. Whether and when the tsunami warning was formally lifted was not immediately clear, and the long-term humanitarian and economic impact of either event had yet to be assessed.
Indonesia is one of the world's most seismically active countries, an archipelago of more than 17,000 islands that straddles the Pacific Ring of Fire — the arc of fault lines and volcanoes circling much of the Pacific Basin. The country has a long history of catastrophic seismic events, most notably the 2004 Indian Ocean tsunami. The two 2026 earthquakes, separated by just over four months, are a reminder that for millions of Indonesians, the question is rarely whether the next major quake will come, but when.
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