Moderate magnitude 4.5 quake hits 45 km southwest of Salina Cruz, Mexico early morning

An earthquake of magnitude 4.5 occurred only 23 minutes ago 45 km southwest of Salina Cruz, Mexico, the United States Geological Survey reported.
The quake hit at a moderately shallow depth of 51.92 km beneath the epicenter near Salina Cruz, Estado de Oaxaca, Mexico, early morning on Saturday, January 31st, 2026, at 3:58 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 Incorporated Research Institutions for Seismology (IRIS), which listed it as a magnitude 4.5 earthquake as well. A third agency, the European-Mediterranean Seismological Centre (EMSC), reported the same quake 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 San Francisco de Asis (pop. 85) located 3 km from the epicenter, and San Pedro Huamelula (pop. 2,200) 9 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Salina Cruz (pop. 84,400) located 45 km from the epicenter, Santo Domingo Tehuantepec (pop. 67,700) 47 km away, Heroica Villa de San Blas Atempa (pop. 12,000) 49 km away, Crucecita (pop. 15,100) 67 km away, Juchitan de Zaragoza (pop. 88,300) 74 km away, and Ixtepec (pop. 25,400) 75 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: Jan 31, 2026 03:58 am (GMT -6) local time (31 Jan 2026 09:58 GMT)
Magnitude: 4.5
Depth: 51.92 km
Epicenter latitude / longitude: 16.08°N / 95.6°W (San Dionisio del Mar, Estado de Oaxaca, Mexico)
Primary data source: USGS
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