A powerful magnitude 7.4 undersea earthquake struck the Molucca Sea off the coast of Indonesia’s Ternate island early Thursday, April 2, 2026. The quake, which hit at 6:48 AM local time at a depth of 35 km, toppled buildings, triggered a brief regional tsunami warning, and caused widespread panic across North Maluku and North Sulawesi provinces.
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While initial reports feared a major tsunami, authorities have since confirmed that the threat has passed and the tsunami warning has been lifted.
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Casualties and Damage Assessment
The earthquake’s impact was felt most severely in the cities of Manado, Bitung, and Ternate.
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Fatalities: One death has been confirmed in Manado, North Sulawesi. A 70-year-old woman was killed when her home collapsed due to the intense shaking.
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Injuries: At least three people in Ternate have been hospitalized with various injuries.
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Infrastructure: Significant damage was reported in Ternate, including the collapse of a church and several residential houses. In Manado, footage showed cracked walls and debris-strewn streets.
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Power Outages: Residents in Manado reported immediate power cuts following the tremors, which lasted between 10 and 20 seconds.
Tsunami Observations
The Pacific Tsunami Warning Center and Indonesia’s BMKG recorded small tsunami waves at several monitoring stations shortly after the quake:
| Location | Wave Height |
| North Minahasa (North Sulawesi) | 0.75 m (30 inches) |
| North Maluku Coast | 0.30 m |
| Bitung (North Sulawesi) | 0.20 m |
Smaller waves (less than 0.2 m) were also monitored as far away as Japan and Palau, but no damage was reported in those regions.
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Regional Alerts: Philippines and Malaysia
The quake’s epicenter was located roughly 580 km south of the Philippine coast, prompting immediate alerts in neighboring countries:
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Philippines: The seismology agency Phivolcs monitored the situation closely but ultimately declared there was “no destructive tsunami threat” to the country.
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Malaysia: Authorities in Sabah (1,000 km from the epicenter) issued a cautionary notice but confirmed no tsunami threat to Malaysian coastlines.
Investigative Insight: The Ring of Fire and Aftershock Risks
Indonesia’s location on the “Pacific Ring of Fire” makes it one of the most seismically active nations on Earth. This specific 7.4 magnitude event in the Molucca Sea is particularly concerning because of the “double subduction zone” in the region, where two separate tectonic plates are diving beneath a third.
Since the main quake, the USGS has recorded nearly 50 aftershocks, the largest reaching a magnitude of 5.5. Geologists warn that while the tsunami threat is over, the risk of “secondary collapses” is high. Buildings that were structurally weakened by the initial 7.4 jolt may fall during smaller aftershocks. Residents in Ternate and Bitung are being urged to avoid returning to damaged concrete structures until a full safety audit is completed by the National Disaster Management Agency (BNPB).
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