Magnitude 4.3 earthquake strikes near Santa Cruz, Provincia de Colchagua, Region del Libertador General Bernardo O'Higgins, Chile

An earthquake of magnitude 4.3 occurred early evening on Thursday, October 30th, 2025, at 6:16 pm local time near Santa Cruz, Provincia de Colchagua, Region del Libertador General Bernardo O'Higgins, Chile, as reported by The National Seismological Center (Centro Sismológico Nacional, CSN) of the University of Chile.
According to preliminary data, the quake was located at a shallow depth of 28. km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.5. Other agencies reporting the same quake include the citizen-seismograph network of RaspberryShake at magnitude 4.5, and the German Research Centre for Geosciences (GFZ) at magnitude 4.5.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Santa Cruz (pop. 33,300) located 29 km from the epicenter, and Curico (pop. 102,400) 40 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Molina (pop. 28,800) located 47 km from the epicenter, Chimbarongo (pop. 17,400) 54 km away, San Vicente de Tagua Tagua (pop. 29,600) 64 km away, San Vicente (pop. 22,600) 64 km away, Rengo (pop. 38,100) 82 km away, and Rancagua (pop. 212,700) 107 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you’re in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.


Earthquake data:
Date & time: Oct 30, 2025 06:16 pm (GMT -3) local time (30 Oct 2025 21:16 GMT)
Magnitude: 4.3
Depth: 28.00 km
Epicenter latitude / longitude: 34.8°S / 71.62°W (Provincia de Colchagua, Region del Libertador General Bernardo O'Higgins, Chile)
Primary data source: CSN
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