2017 Chiapas earthquake

2017 Chiapas earthquake
2017 Intensity of the earthquake in Mexico (Chiapas).jpg
2017 Chiapas earthquake is located in Mesoamerica
2017 Chiapas earthquake
Date 7 September 2017 (2017-09-07)
Origin time 23:49:21 CDT
Magnitude 8.1 Mw
Depth 69.7 km (43.3 mi)
Epicenter 15°04′05″N 93°42′54″W / 15°04′05″N 93°42′54″W / 15.068; -93.715
Areas affected Mexico, Guatemala [1]
Max. intensity IX (Violent)
Tsunami Yes
Foreshocks 1
Aftershocks 3,831 [2]
Casualties 98 dead, 300+ injured

The 2017 Chiapas earthquake struck at 23:49 CDT on 7 September (local time; 04:49 on the 8th UTC) in the Gulf of Tehuantepec off the southern coast of Mexico, near state of Chiapas, approximately 87 kilometres (54 mi) south of Pijijiapan, with a Mercalli intensity of IX (Violent). [3] [4] The magnitude was estimated to be Mw 8.1. [5]

The earthquake caused some buildings in Mexico City to tremble, prompting people to evacuate. [3] It also generated a tsunami with waves of 1.75 metres (5 ft 9 in) above tide level; [6] and tsunami alerts were issued for surrounding areas. [7] Mexico's president called it the strongest earthquake recorded in the country, in a century. [8] It was also the second strongest recorded in the country's history, behind the magnitude 8.6 earthquake in 1787, [9] and the most intense recorded globally, so far in 2017. [10]

Tectonic setting

The Gulf of Tehuantepec lies above the convergent boundary where the Cocos Plate is being subducted below the North American Plate at a rate of 6.4 cm/yr (2.5 in/yr). [11] [12]

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