Moderate mag. 4.0 earthquake - Magdalena Tlacotepec, 18 km north of Santo Domingo Tehuantepec, Oaxaca, Mexico, on Monday, Sep 20, 2021 9:49 pm (GMT -5) -

Moderate mag. 4.0 earthquake - Magdalena Tlacotepec, 18 km north of Santo Domingo Tehuantepec, Oaxaca, Mexico, on Monday, Sep 20, 2021 9:49 pm (GMT -5)

Moderate magnitude 4.0 earthquake at 7 km depth

21 Sep 03:12 UTC: First to report: EMSC after 23 minutes.
21 Sep 03:21: Now using data updates from SSN
Date & time: Sep 21, 2021 02:49:25 UTC -
Local time at epicenter: Monday, Sep 20, 2021 9:49 pm (GMT -5)
Magnitude: 4
Depth: 7.0 km
Epicenter latitude / longitude: 16.48°N / 95.28°W (Magdalena Tlacotepec, Oaxaca, Mexico)
Antipode: 16.48°S / 84.72°E
Nearest volcano: San Martín (233 km / 145 mi)
Nearby towns and cities:
9 km (5 mi) WSW of Colonia Deportivo (pop: 13) --> See nearby quakes!
18 km (11 mi) NNW of San Blas Atempa (pop: 12,000) --> See nearby quakes!
18 km (11 mi) NNW of Santo Domingo Tehuantepec (Tehuantepec) (pop: 42,100) --> See nearby quakes!
18 km (11 mi) ENE of Santa Maria Jalapa del Marqués (pop: 9,000) --> See nearby quakes!
21 km (13 mi) WSW of Ixtepec (pop: 25,400) --> See nearby quakes!
28 km (18 mi) W of Juchitan de Zaragoza (pop: 74,800) --> See nearby quakes!
35 km (22 mi) NNW of Salina Cruz (pop: 76,600) --> See nearby quakes!
51 km (32 mi) SSW of Matias Romero Avendaño (Matías Romero Avendaño) (pop: 18,900) --> See nearby quakes!
167 km (104 mi) ESE of Oaxaca (pop: 255,000) --> See nearby quakes!
523 km (325 mi) SE of Mexico City (pop: 12,294,200) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 22.7°C (73 F), humidity: 86%, wind: 2 m/s (4 kts) from NW
Primary data source: SSN (Servicio Sismológico Nacional)
Estimated released energy: 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 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.
4.07 kmMexico: 18 Km Al NORTE De TEHUANTEPEC, OAXSSN

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Bauxite AR (1975 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating : Just a little bit of steady vibration and some grumbling under foot. No swaying or rocking this time.  
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