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Seismic Collapse Traps Five at Chile's El Teniente Copper Mine

O'HIGGINS REGION, CHILE, AUG 2 – A 4.2 magnitude tremor caused the collapse that killed one miner and trapped five others at Chile's El Teniente copper mine, with rescue teams working amid aftershocks and halted mining operations.

  • Thursday at around 5.30 pm, a seismic event caused a collapse at El Teniente copper mine in O'Higgins Region, killing one worker, injuring nine, and leaving five missing.
  • Authorities say the collapse followed a “seismic event” of uncertain origin, as Codelco investigates whether natural causes or mining activity caused the tremor.
  • Rescuers have struggled to reach miners trapped 900 meters underground, as aftershocks have blocked access, delaying contact efforts for over 18 hours.
  • Sernageomin launched an investigation and halted underground operations at El Teniente, while Williams vowed, “We are going to issue a provisional measure to halt operations in the underground sections of El Teniente,” and a yellow alert was issued for Machalí.
  • Codelco faces long-term output challenges after the collapse, as the Andesita project, expected to produce 60,000 to 70,000 metric tonnes annually, faces delays despite its planned start this year.
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Lean Left

One of the five miners trapped in Chile at a depth of 1,200 metres was found dead by rescuers, said the public group Codelco.

·Montreal, Canada
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Far Left

The rescue teams recovered on Saturday the remains of one of the five miners trapped since Thursday in El Teniente, the world’s largest underground copper mine, located in the O’Higgins region, 120 kilometers south of Santiago. READ ALSO: One hundred brigadistas work counterclockwise in Chile to rescue five trapped miners The finding, confirmed by the state’s Codelco, the largest copper producer worldwide, took place as efforts continue to locat…

Lean Right

RANCAGUA, Chile.- The president of Chile, Gabriel Boric, visited this Saturday the underground mine El Teniente to supervise the rescue efforts, while the rescuers still did not make contact with the five miners trapped from Thursday to 1200 meters deep.With 4500 kilometers of interior galleries, El Teniente is the largest underground copper deposit on the planet, owned by the state cuprifera Codelco, the world's largest copper producer.“Here yo…

·Buenos Aires, Argentina
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Lean Right

The Lieutenant, the mine in central Chile where five miners have been trapped since Thursday, is a colossus of unique dimensions in the world, with more than 4,500 kilometers of tunnels, excavated throughout its 120 years of history.

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Cooperativa broke the news in on Thursday, July 31, 2025.
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