Moderate mag. 4.3 earthquake - Villa de Tututepec de Melchor Ocampo, 56 km southeast of Pinotepa Nacional, Mexico, on Wednesday, Jul 28, 2021 3:23 pm (GMT -5) -

Moderate mag. 4.3 earthquake - Villa de Tututepec de Melchor Ocampo, 56 km southeast of Pinotepa Nacional, Mexico, on Wednesday, Jul 28, 2021 3:23 pm (GMT -5)

Moderate magnitude 4.3 earthquake at 14 km depth

28 Jul 20:42 UTC: First to report: SSN after 19 minutes.
Update Wed, 28 Jul 2021, 20:48
Moderate magnitude 4.3 quake hits 56 km southeast of Pinotepa Nacional, Mexico early afternoon
4.3 quake 28 Jul 3:23 pm (GMT -5)
4.3 quake 28 Jul 3:23 pm (GMT -5)
A shallow magnitude 4.3 earthquake was reported early afternoon near Pinotepa Nacional, Santiago Pinotepa Nacional, Oaxaca, Mexico.
According to Mexico's National Seismological Service (SSN), the quake hit on Wednesday 28 July 2021 at 3:23 pm local time at a shallow depth of 14 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 4.3 earthquake 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 Zanjon (pop. 120) located 1 km from the epicenter, Santa Rosa de Lima (pop. 2,200) 3 km away, and La Luz (pop. 2,400) 4 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Rio Grande (pop. 12,900) located 19 km from the epicenter, San Miguel Panixtlahuaca (pop. 5,700) 31 km away, and Santiago (pop. 10,100) 33 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Pinotepa Nacional (pop. 29,600) located 56 km from the epicenter, and Puerto Escondido (pop. 25,900) 61 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.
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Earthquake data

Date & time: Jul 28, 2021 20:23:21 UTC -
Local time at epicenter: Wednesday, Jul 28, 2021 3:23 pm (GMT -5)
Magnitude: 4.3
Depth: 14.0 km
Epicenter latitude / longitude: 16.08°N / 97.6°W (Villa de Tututepec de Melchor Ocampo, Oaxaca, Mexico)
Antipode: 16.08°S / 82.4°E
Nearby towns and cities:
1 km (1 mi) SSW of El Zanjon (pop: 121) --> See nearby quakes!
12 km (7 mi) SW of Santa Maria Acatepec (pop: 1,170) --> See nearby quakes!
19 km (12 mi) WNW of Rio Grande (pop: 12,900) --> See nearby quakes!
26 km (16 mi) SSW of Tepenixtlahuaca (pop: 2,550) --> See nearby quakes!
31 km (19 mi) SW of San Miguel Panixtlahuaca (pop: 5,680) --> See nearby quakes!
33 km (20 mi) SE of Santiago (pop: 10,100) --> See nearby quakes!
56 km (35 mi) ESE of Pinotepa Nacional (pop: 29,600) --> See nearby quakes!
61 km (38 mi) WNW of Puerto Escondido (pop: 25,900) --> See nearby quakes!
144 km (89 mi) SW of Santa Maria (pop: 255,000) --> See nearby quakes!
406 km (252 mi) SSE of Mexico City (pop: 12,294,200) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 31°C (88 F), humidity: 63%, wind: 4 m/s (8 kts) from WSW
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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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.
Mag.DepthLocationSource
4.314 kmMexico: 19 Km Al NOROESTE De RIO GRANDE, OAXSSN
4.314 kmOAXACA, MEXICOEMSC

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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Oaxtepec, Morelos (346.6 km NNW of epicenter) [Map] / not felt (reported through our app)
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