M5.3 earthquake strikes 51 km WSW of Arauco, Argentina; depth 121 km

A magnitude 5.3 earthquake occurred at 09:21 UTC on 2026-09-23, centered 51 km WSW of Arauco, Argentina, at a depth of 121.53 km. The moderate depth and magnitude suggest limited surface impact; no damage or casualties reported yet. This is a routine seismic event in an active tectonic region, with no immediate market or geopolitical implications.