Moderate mag. 3.9 earthquake - 17 km east of Acapulco de Juarez, Guerrero, Mexico, on Monday, Sep 20, 2021 9:32 pm (GMT -5) -

This quake was likely an aftershock of the 7.1 quake North Pacific Ocean, 8 km south of Acapulco de Juarez, Guerrero, Mexico, Sep 7, 2021 8:47 pm (GMT -5), which had occurred 13 days earlier.
Moderate mag. 3.9 earthquake - 17 km east of Acapulco de Juarez, Guerrero, Mexico, on Monday, Sep 20, 2021 9:32 pm (GMT -5)

Moderate magnitude 3.9 earthquake at 10 km depth

21 Sep 02:37 UTC: First to report: VolcanoDiscovery after 4 minutes.
21 Sep 03:32: Now using data updates from EMSC
21 Sep 03:35: Now using data updates from SSN
Date & time: Sep 21, 2021 02:32:46 UTC -
Local time at epicenter: Monday, Sep 20, 2021 9:32 pm (GMT -5)
Magnitude: 3.9
Depth: 10.0 km
Epicenter latitude / longitude: 16.79°N / 99.76°W (Acapulco de Juarez, Guerrero, Mexico)
Antipode: 16.79°S / 80.24°E
Nearby towns and cities:
3 km (2 mi) ESE of Fraccionamiento Campestre de la Laguna (pop: 163) --> See nearby quakes!
11 km (7 mi) WSW of Amatillo (pop: 3,300) --> See nearby quakes!
17 km (11 mi) ESE of Acapulco de Juarez (pop: 673,500) --> See nearby quakes!
23 km (14 mi) S of Kilometro 30 (Centro) (pop: 6,300) --> See nearby quakes!
29 km (18 mi) SE of Bajos del Ejido (pop: 6,170) --> See nearby quakes!
39 km (25 mi) W of San Marcos (pop: 13,300) --> See nearby quakes!
42 km (26 mi) SE of Coyuca de Benitez (Coyuca de Benítez) (pop: 13,600) --> See nearby quakes!
89 km (55 mi) SSW of Chilpancingo (pop: 187,300) --> See nearby quakes!
89 km (55 mi) SSW of Chilpancingo (pop: 187,300) --> See nearby quakes!
301 km (187 mi) SSW of Mexico City (pop: 12,294,200) --> See nearby quakes!
Primary data source: SSN (Servicio Sismológico Nacional)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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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.
3.910 kmMexico: 17 Km Al SURESTE De ACAPULCO, GROSSN
3.910 kmNear Acapulco De Juarez, Guerrero, MexicoEMSC

User reports for this quake (4)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Acapulco de Juarez, Guerrero (18.2 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / simple rolling (tilting sideways along one direction) / 1-2 s : Muy corto pero retumbante  
Pedregal De Cantaluna. (1.7 km NNE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : sharp sideways jolt. 1 or 2 seconds. no accompanying sound.  
acapulco de juarez (12.3 km NW of epicenter) [Map] / Light shaking (MMI IV) : Felt vibration in my recliner (reported through our app)  
Acapulco (9.7 km NW of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / very short : I was in my house with my family and then the earthquake feel it like a shake  
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