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2020 Oaxaca earthquake

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UTC time2020-06-23 15:29:05
ISC event618580119
USGS-ANSSComCat
Local date23 June 2020 (2020-06-23)
Local time10:29 a.m.
Magnitude7.4 Mw
Depth26.3 km (16.3 mi)
Epicenter16°01′44″N 95°54′04″W / 16.029°N 95.901°W / 16.029; -95.901Coordinates: 16°01′44″N 95°54′04″W / 16.029°N 95.901°W / 16.029; -95.901
TypeThrust
Areas affectedMexico, Oaxaca, Mexico City
Max. intensityVII (Very strong)
Casualties10 dead
23 injured[1]

An earthquake struck the Mexican state of Oaxaca at 10:29 local time on June 23, 2020, with a magnitude of 7.4 Mw.[2] The epicenter was 19 miles (31 km) from San Miguel del Puerto and 7.5 miles (12.1 km) south-southwest of Santa María Zapotitlán. The tremor was felt in south and central Mexico as well as Guatemala.[3] A tsunami warning was issued for southern Mexico, El Salvador, Guatemala, and Honduras.[4] Streets and buildings were shaken in Mexico City, and damage was observed in at least 14 buildings across the city, including the collapse of a single floor residence and 3 buildings already seriously damaged by the 2017 Puebla earthquake.[4] The quake was felt 640 kilometres (400 mi) away from the epicenter and an estimated 49 million people felt it.[5][6]

Tectonic setting[edit source | edit]

Oaxaca lies above the convergent boundary where the Cocos Plate is being subducted beneath the North American Plate. The rate of convergence in this part of the boundary is 60 mm per year. This boundary is associated with many damaging earthquakes; along the plate interface, within the descending Cocos slab and within the overriding North American Plate. The most recent event in the same region as the 2020 earthquakes was the 2018 Oaxaca earthquake, which struck 225 km to the northwest.[2]

Earthquake[edit source | edit]

According to the United States Geological Survey (USGS), the epicenter of the earthquake was located 12 kilometres (7.5 mi) south-southwest of Santa María Zapotitlán, Oaxaca, between La Crucecita in the Bahías de Huatulco tourist resort to the southwest and the port of Salina Cruz to the northeast. The hypocentral depth was 26.3 km (16.3 mi). The depth and the observed focal mechanism are consistent with displacement on the plate interface.[2]

Damage[edit source | edit]

Widespread damage was reported from Oaxaca, with over 2,000 houses affected across 85 municipalities.[1]

Casualties[edit source | edit]

As of June 24, 2020, 10 deaths had been reported in Oaxaca,[1][7] including a worker at the PEMEX oil refinery in Salina Cruz,[8] with two dozen injured.[7]

See also[edit source | edit]

References[edit source | edit]

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Template:Earthquakes in 2020 Template:Earthquakes in Mexico