Moderate mag. 4.3 earthquake - El Cocoyult, 1 km east of El Cocoyult (Coacoyul), San Marcos, Guerrero, Mexico, on Thursday, Jan 7, 2021 9:00 pm (GMT -6) -

Moderate mag. 4.3 earthquake - El Cocoyult, 1 km east of El Cocoyult (Coacoyul), San Marcos, Guerrero, Mexico, on Thursday, Jan 7, 2021 9:00 pm (GMT -6)

Moderate magnitude 4.3 earthquake at 5 km depth

8 Jan 03:21 UTC: First to report: SSN after 20 minutes.
Update Fri, 8 Jan 2021, 03:27
Magnitude 4.3 earthquake strikes near El Cocoyult (Coacoyul), San Marcos, Guerrero, Mexico
4.3 quake 7 Jan 9:00 pm (GMT -6)
4.3 quake 7 Jan 9:00 pm (GMT -6)
A magnitude 4.3 earthquake near El Cocoyult (Coacoyul), San Marcos, Guerrero, Mexico, was reported only 26 minutes ago by Mexico's National Seismological Service (SSN), considered the main national agency that monitors seismic activity in Mexico. The earthquake occurred at a very shallow depth of 5 km beneath the epicenter in the evening on Thursday 7 January 2021 at 9:00 pm 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.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.3 as well.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In El Cocoyult (Coacoyul) (pop. 690) located 1 km from the epicenter, La Estancia (pop. 160) 2 km away, El Carmen (pop. 110) 2 km away, El Carmen (pop. 110) 2 km away, El Cortés (pop. 1,200) 3 km away, Monte Alto (pop. 930) 5 km away, Llano de la Puerta (pop. 1,300) 5 km away, and San Marcos (pop. 13,300) 11 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Acapulco de Juarez (pop. 673,500) located 47 km from the epicenter.
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.

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Earthquake data

Date & time: Jan 8, 2021 03:00:38 UTC -
Local time at epicenter: Thursday, Jan 7, 2021 9:00 pm (GMT -6)
Magnitude: 4.3
Depth: 5.0 km
Epicenter latitude / longitude: 16.76°N / 99.48°W (El Cocoyult, Guerrero, Mexico)
Antipode: 16.76°S / 80.52°E
Nearby towns and cities:
1 km (1 mi) E of El Cocoyult (Coacoyul) (San Marcos) (pop: 693) --> See nearby quakes!
11 km (7 mi) WSW of San Marcos (pop: 13,300) --> See nearby quakes!
15 km (9 mi) ENE of Lomas de Chapultepec (pop: 2,170) --> See nearby quakes!
21 km (13 mi) ESE of Amatillo (pop: 3,300) --> See nearby quakes!
38 km (24 mi) W of Florencio Villarreal (Cruz Grande) (pop: 11,800) --> See nearby quakes!
47 km (29 mi) WSW of Ayutla de los Libres (pop: 15,400) --> See nearby quakes!
47 km (29 mi) ESE of Acapulco de Juarez (pop: 673,500) --> See nearby quakes!
88 km (55 mi) S of Chilpancingo (pop: 187,300) --> See nearby quakes!
299 km (186 mi) S of Mexico (Ciudad de México) (pop: 12,294,200) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 25°C (77 F), humidity: 83%, wind: 1 m/s (1 kts) from N
Primary data source: SSN (Servicio Sismológico Nacional)
Estimated released energy: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) More info
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
4.35 km11 Km Al SUROESTE De SAN MARCOS, GRO, MexicoSSN

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Mark as helpful or interesting.
Send your own user report!
Campobello, sc / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s : Felt at 11:03 pm our time then a little harder a few minutes later.  
Guitteron, Acapulco, Guerrero / Very weak shaking (MMI II) / 2-5 s : Very Brief, felt while laying on sofa  
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