A powerful 7.4-magnitude earthquake struck the Molucca Sea in eastern Indonesia late Wednesday UTC, prompting tsunami warnings for nearby coastal areas.
The U.S. Geological Survey reported the quake at 22:48 UTC on April 1, placing the epicenter at 1.117°N, 126.297°E, approximately 126 kilometers west-northwest of Ternate in North Maluku province. At a depth of 35 kilometers, the tremor was classified as shallow, increasing its potential to be felt widely. Local time in Ternate struck shortly before 8 a.m. on Thursday.
The Pacific Tsunami Warning Center issued a tsunami threat for Indonesia, forecasting waves of 0.3 to 1 meters along affected coasts. No widespread tsunami observations have been reported as of late evening EDT Wednesday. Authorities in the region urged coastal residents to move to higher ground as a precaution.
The USGS issued a green alert through its Prompt Assessment of Global Earthquakes for Response system, indicating a low likelihood of casualties or significant economic losses from shaking. Community intensity reports peaked at VI on the Modified Mercalli scale, describing strong shaking capable of awakening sleepers and causing dishes to rattle. No confirmed damage or injuries have surfaced in initial assessments.
Tectonically, the event resulted from reverse faulting near the interface of the subducted Halmahera slab and the overlying Sunda plate in eastern Indonesia's complex boundary zone. The region sees frequent large quakes, with nine magnitude 7.0 or greater events within 250 kilometers over the past 50 years. A similar magnitude 7.5 quake in 2007 nearby caused minor damage and three fatalities on Sulawesi.
Indonesia's Meteorology, Climatology and Geophysics Agency monitored the event closely, consistent with the archipelago's position on the Pacific Ring of Fire. As aftershocks remain possible, officials advised vigilance in vulnerable areas. Updates continue as more data emerges.
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