Moderate mag. 4.0 earthquake - 17 km northwest of Río Grande, Villa de Tututepec de Melchor Ocampo, Oaxaca, Mexico, on 2020-07-31 10:32:09 (Hora de México)
This quake was likely an aftershock of the 7.3 quake 15 km northeast of Merced del Potrero, San Miguel del Puerto, Oaxaca, Mexico, 2020-06-23 09:29:07, which had occurred 5 weeks earlier.
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Moderate magnitude 4.0 earthquake at 10 km depth
31 Jul 15:56 UTC: First to report: SSN after 24 minutes.
Earthquake details
| Date & time | Jul 31, 2020 15:32:09 UTC |
| Local time at epicenter | 2020-07-31 10:32:09 (Hora de México) |
| Status | Confirmed |
| Magnitude | 4 |
| Depth | 10.0 km |
| Epicenter latitude / longitude | 16.1°N / 97.56°W  (Villa de Tututepec de Melchor Ocampo, Oaxaca, Mexico) |
| Antipode | 16.1°S / 82.44°E |
| Shaking intensity | Light shaking near epicenter |
| Felt | 0 reports |
| Primary data source | SSN (Servicio Sismológico Nacional) |
| Nearby towns and cities | 2 km (1 mi) N of Chacalapa (pop: 466) | Show on map | Quakes nearby 17 km (10 mi) NW of Rio Grande (pop: 12,900) | Show on map | Quakes nearby 23 km (14 mi) SSW of Tepenixtlahuaca (pop: 2,550) | Show on map | Quakes nearby 26 km (16 mi) SW of San Miguel Panixtlahuaca (pop: 5,680) | Show on map | Quakes nearby 34 km (21 mi) WSW of Santiago Yaitepec (pop: 4,120) | Show on map | Quakes nearby 35 km (22 mi) SE of Santiago (pop: 10,100) | Show on map | Quakes nearby 58 km (36 mi) WNW of Puerto Escondido (pop: 25,900) | Show on map | Quakes nearby 59 km (37 mi) ESE of Santiago Pinotepa Nacional (pop: 29,600) | Show on map | Quakes nearby 140 km (87 mi) SW of Oaxaca (pop: 255,000) | Show on map | Quakes nearby 406 km (252 mi) SSE of Mexico (Ciudad de México) (pop: 12,294,200) | Show on map | Quakes nearby |
| Estimated seismic energy released | 6.3 x 1010 joules (17.5 megawatt hours, equivalent to 15.1 tons of TNT) | about seismic energy |
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. | Depth | Location | Source |
| 4.0 | 10 km | 17 km al NOROESTE de RIO GRANDE, OAX (Mexico) | SSN |
| 4.0 | 10 km | Oaxaca, Mexico | EMSC |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Earlier earthquakes in the same area
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