Overview

• Chile’s seismology agency reported a magnitude 7.8 quake at 5:29 p.m. local time about 263 kilometers northwest of Base Presidente Eduardo Frei Montalva at a depth of roughly 10 kilometers.
• The U.S. Geological Survey estimated the same event at magnitude 7.6, reflecting routine differences in early readings.
• Chile’s naval hydrographic service issued a localized state of concern for the commune of Cabo de Hornos as it evaluates tsunami risk in the Antarctic sector.
• Authorities had no reports of casualties or confirmed damage as assessments continued in the remote region.
• The quake struck in a tectonically active zone where the South American and Antarctic plates converge near Chile’s Air Force–run Base Frei and its Antarctic aerodrome.