A magnitude 3.7 earthquake near Quillota, Provincia de Quillota, Region de Valparaiso, Chile, was reported only 15 minutes ago by The National Seismological Center (Centro Sismológico Nacional, CSN) of the University of Chile, considered the main national agency that monitors seismic activity in this part of the world. The earthquake occurred at a moderately shallow depth of 63. km beneath the epicenter after midnight on Monday, July 21st, 2025, at 12:54 am local time. 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.A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.9 earthquake.Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Hacienda La Calera (pop. 49,100) located 13 km from the epicenter, Quillota (pop. 67,800) 13 km away, Limache (pop. 35,900) 23 km away, and Villa Alemana (pop. 97,300) 33 km away. In San Felipe (pop. 59,300, 38 km away), Quilpue (pop. 130,300, 38 km away), Vina del Mar (pop. 294,600, 45 km away), Valparaiso (pop. 282,400, 53 km away), and Santiago (pop. 4,837,300, 80 km away), the quake was probably not felt.Earthquake data: Date & time: Jul 21, 2025 12:54 am (GMT -4) local time (21 Jul 2025 04:54 GMT)Magnitude: 3.7Depth: 63.00 kmEpicenter latitude / longitude: 32.85°S / 71.11°W (San Felipe de Aconcagua, Region de Valparaiso, Chile)Primary data source: CSN