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Light mag. 4.4 earthquake - 38 km northeast of Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico, on 19 Jul 9:50 pm (GMT -5)

Light magnitude 4.4 earthquake at 58 km depth

20 Jul 03:07 UTC: First to report: EMSC after 17 minutes.

Update Tue, 20 Jul 2021, 03:12

Moderate magnitude 4.4 quake hits 38 km northeast of Heroica Ciudad de Tlaxiaco, Mexico in the evening

4.4 quake 19 Jul 9:50 pm (GMT -5)

Just 22 minutes ago, a 4.4-magnitude earthquake struck near Heroica Ciudad de Tlaxiaco, Oaxaca, Mexico. The tremor was recorded in the evening on Monday 19 July 2021 at 9:50 pm local time, at a moderately shallow depth of 58 km below the surface.
The event was filed by the European-Mediterranean Seismological Centre (EMSC), the first seismological agency to report it.
A second report was later issued by Mexico's National Seismological Service (SSN), which listed it as a magnitude 4.4 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Santiago Nejapilla (pop. 190) located 1 km from the epicenter, Asuncion (pop. 13,300) 16 km away, Santiago Yolomécatl (pop. 1,900) 22 km away, Tamazulapam Villa del Progreso (pop. 5,000) 35 km away, Heroica Ciudad de Tlaxiaco (pop. 17,500) 38 km away, Huajuapan de Leon (pop. 53,000) 60 km away, Santa Maria Atzompa (pop. 21,800) 73 km away, Santa Maria (pop. 255,000) 80 km away, and Santa Cruz Xoxocotlan (pop. 67,100) 81 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 details

Date & time	Jul 20, 2021 02:50:13 UTC
Local time at epicenter	19 Jul 9:50 pm (GMT -5)
Status	Confirmed
Magnitude	4.4
Depth	58.0 km
Epicenter latitude / longitude	17.43°N / 97.37°W (Santiago Nejapilla, Oaxaca, Mexico)
Antipode	17.43°S / 82.63°E
Shaking intensity	Weak shaking near epicenter
Felt	0 reports
Primary data source	EMSC (European-Mediterranean Seismological Centre)
Nearest volcano	Pico de Orizaba (178 km / 111 mi)
Nearby towns and cities	1 km (1 mi) NNE of Santiago Nejapilla (pop: 192) \| Show on map \| Quakes nearby 16 km (10 mi) WSW of Asuncion (Asunción Nochixtlán) (pop: 13,300) \| Show on map \| Quakes nearby 22 km (13 mi) ESE of Santiago Yolomécatl (pop: 1,880) \| Show on map \| Quakes nearby 35 km (22 mi) SE of Tamazulapam Villa del Progreso (Villa de Tamazulápam del Progreso) (pop: 5,030) \| Show on map \| Quakes nearby 38 km (23 mi) ENE of Heroica Ciudad de Tlaxiaco (Centro) (pop: 17,500) \| Show on map \| Quakes nearby 60 km (38 mi) SE of Huajuapan de Leon (pop: 53,000) \| Show on map \| Quakes nearby 73 km (45 mi) WNW of Santa Maria Azompa (pop: 21,800) \| Show on map \| Quakes nearby 80 km (50 mi) WNW of Oaxaca (pop: 255,000) \| Show on map \| Quakes nearby 81 km (50 mi) WNW of Santa Cruz Xoxocotlan (pop: 67,100) \| Show on map \| Quakes nearby 289 km (180 mi) SE of Mexico (Ciudad de México) (pop: 12,294,200) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Overcast Clouds 12.4°C (54 F), humidity: 94%, wind: 2 m/s (4 kts) from NE
Estimated seismic energy released	2.5 x 10¹¹ joules (69.8 megawatt hours, equivalent to 60 tons of TNT) \| about seismic energy

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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.	Depth	Location	Source
4.4	58 km	OAXACA, MEXICO	EMSC
4.4	58 km	Mexico: 38 Km Al NORESTE De H TLAXIACO, OAX	SSN

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Seismograms

Seismic station: TLAPA (TLIG/MX network) | Distance from quake: 128 km / 79 mi | Show on map | Station Info

Seismic station TLAPA: vertical movement plot around time of quake (source: IRIS/BUD)

Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Bandpass filter applied: 0.2-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

There are no user reports for this quake.

Earlier earthquakes in the same area

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