SALTA, Argentina — A strong earthquake struck northwestern Argentina on Saturday on the same day that a massive temblor struck neighboring Chile. Authorities reported at least one person was killed.

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The 6.3 magnitude quake struck around midday about 15 miles north of the city of Salta, some 800 miles north-northwest of the capital Buenos Aires, the U.S. Geological Survey reported.

An 8-year-old boy died and two other children were injured, a hospital director in Salta told local media.

The quake was a separate event, not an aftershock of the devastating magnitude 8.8 quake that struck Chile , officials said.

The Geological Survey said the "triggered earthquake" was caused by ground waves from the Chilean temblor.