2012 Guerrero–Oaxaca earthquake
UTC time | 2012-03-20 18:02:47 |
---|---|
ISC event | 600800706 |
USGS-ANSS | ComCat |
Local date | 20 March 2012 |
Local time | 12:02 |
Duration | 40–300 seconds[1] |
Magnitude | 7.4 Mw[2][3] |
Depth | 20 km (12.4 mi)[2] |
Epicenter | 16°25′N 98°22′W / 16.42°N 98.36°W |
Type | Thrust |
Areas affected | Mexico |
Total damage | Some rural areas affected.[1] Over 30,000 houses damaged or destroyed.[4][5][6] |
Max. intensity | MMI VIII (Severe) |
Aftershocks | 6.0 Mw 2 April at 17:36[7] |
Casualties | 2 dead,[8][9] 11 injured.[6][10] |
The 2012 Guerrero–Oaxaca earthquake struck southern Mexico with a moment magnitude of 7.4 at 12:02 local time on Tuesday, 20 March. Its epicenter was near Ometepec, in the border between the states of Guerrero and Oaxaca. With a shallow focus of 20 km, the earthquake caused strong shaking over a large area along the Oaxaca–Guerrero border and the adjacent Pacific coastline. Significant tremors were felt in areas up to several hundred kilometers away, including Mexico City and also in Guatemala. Two people were killed and over 30,000 houses were damaged or destroyed.
Tectonic setting
The states of Guerrero and Oaxaca lie above the
Earthquake
According to the National Seismological Service (NSS) of Mexico, the epicenter was located in the Oaxaca-Guerrero border, about 30 km south of Ometepec and 8 km southeast of Cuajinicuilapa.[3] The United States Geological Survey (USGS) reported the epicenter in the state of Oaxaca, about 23 km east of Ometepec and 6 km northwest of San Juan Cacahuatepec.[2] The depth was reported as 15 km by NSS[3] and 20 km by the USGS.[2] The slip of the earthquake was compactly distributed in an area of about 30 km × 30 km.[12]
The focal mechanism and depth of the earthquake indicate that it was a result of
The earthquake coincided with an earthquake drill in Chiapas. The earthquake drill, simulating an earthquake of magnitude 7.9 on the Richter scale, was implemented by the Protección Civil of Chiapas on 20 March. The earthquake drill started at 12:00, and the real earthquake occurred just minutes later.[13]
Damage
The airport of Mexico City was closed for a short time and reopened after no damage had been observed.[14] The trading of Mexican Stock Exchange (BMV) was suspended.[15] The earthquake caused power outage in central and eastern Mexico and affected 2.5 million users according to Comisión Federal de Electricidad (CFE).[16] On 22 March it was announced that two people were killed in Cuajinicuilapa because of the earthquake, one direct and one indirect. The first died due to the injuries caused after a wall collapsed on him in El Tamale community, while the second suffered a heart attack, in San Nicolás.[8]
Intensity
The earthquake struck during the midday in a moderately populated region, with a mix of earthquake-resistant and vulnerable structures.
Aftershocks
Multiple aftershocks have been reported in the Guerrero–Oaxaca region. According to the NSS, 828 aftershocks have occurred,[29] the strongest of them was felt on 2 April 2012. It was a magnitude 6.0 MW earthquake that struck at 12:36 local time (18:36 UTC).[30][31]
Aftermath
According to Asociación Mexicana de Instituciones de Seguros (AMIS), it was estimated that insurance companies would have to pay 2.07 billion pesos ($100.9 million
References
- ^ a b "México: Evento de Terremoto duró al menos 5 minutos o más, opinion" [Mexico: Earthquake's duration of 5 minutes or more, Excélsior]. Excélsior (in Spanish). Grupo Imágen. 20 March 2012. Retrieved 20 March 2012.
- ^ a b c d e "M 7.4 - 6 km E of Santiago Llano Grande, Mexico". United States Geological Survey (USGS). 20 March 2012. Retrieved 20 March 2012.
- ^ a b c "Cálculo de la Magnitud Definitiva para el Sismo del 20 Marzo de 2012 en Ometepec, Guerrero" (PDF). Servicio Sismológico Nacional. National Autonomous University of Mexico. 21 March 2012. Archived from the original (PDF) on 16 April 2012. Retrieved 21 March 2012.
- ^ "Daña miles de casas" [Damaged thousands of homes]. Diario de Yucatán (in Spanish). Grupo Megamedia. 22 March 2012. Archived from the original on 25 March 2012. Retrieved 22 March 2012.
- XEW-TV.
- ^ a b Vervaeck, Armand; Daniell, James (22 March 2012). "Earthquake in Guerrero – Oaxaca, Mexico – at least 32000 houses damaged in Guerrero, 11 injured". SOS Earthquakes. Archived from the original on 19 September 2012. Retrieved 22 March 2012.
- ^ USGS, M6.0 – Oaxaca, Mexico, United States Geological Survey
- ^ a b "Anuncian que dos personas murieron por el terremoto del martes en México" [Announced that two people were killed by the earthquake on Tuesday in Mexico] (in Spanish). BBC News. BBC. 23 March 2012. Retrieved 23 March 2012.
- APN News & Media. 23 March 2012. Archived from the originalon 24 March 2012. Retrieved 23 March 2012.
- ^ "Nación – De 7.93 grados, el sismo en México, rectifica el SSN" [Nation – From 7.93 degrees, the earthquake in Mexico, corrected the NSS]. El Universal (in Spanish). El Universal Compañía Periodística Nacional S.A. de C.V. 20 March 2012. Archived from the original on 12 October 2012. Retrieved 20 March 2012.
- . Retrieved 20 March 2012.
- ^ "Slip-History database :: 2012 OAXACA, MEXICO Earthquake, Mw7.4". Retrieved 28 December 2016.
- ^ "Sismo en Chiapas coincide con simulacro". Archived from the original on 21 February 2013. Retrieved 25 August 2012.
- ^ "Un séisme de magnitude 7,4 frappe le Mexique". 20 March 2012. Retrieved 28 December 2016.
- ^ a b Economista, Yuridia Torres / El. "Oficinas de gobierno solicitan indemnización". Retrieved 28 December 2016.
- ^ Notimex. "Casi al 100% restauración de servicio de CFE tras sismo". Retrieved 28 December 2016.
- ^ a b "PAGER – M 7.4 – Oaxaca, Mexico". United States Geological Survey (USGS). 20 March 2012. Archived from the original on 22 March 2012. Retrieved 20 March 2012.
- ^ FOROtv.
- ^ Graham, Dave (20 March 2012). "Big earthquake hits Mexico, no major damage reported". Reuters. Retrieved 20 March 2012.
- ^ "Sacude sismo trece estados, Guerrero es el más afectado". 21 March 2012. Retrieved 28 December 2016.
- ^ "Home". Retrieved 28 December 2016.
- ^ "Tamaulipas – Noticias – Grupo Milenio". Retrieved 28 December 2016.
- ^ "Desalojan edificios de San Luis por temblor del Distrito Federal, EL EXPRÉS, San Luis Potosí". elexpres.com. Archived from the original on 26 March 2012. Retrieved 17 January 2022.
- ^ "El Sur :: Sin afectaciones en Campeche por sismo, informa Cenecam". www.elsur.mx. Archived from the original on 18 May 2015. Retrieved 17 January 2022.
- ^ "Milenio: Últimas Noticias de México – Actualidad global – Grupo Milenio". Archived from the original on 22 March 2012. Retrieved 28 December 2016.
- ^ Juárez García, Hugón & Gomez-Bernal, Alonso & Rangel, José & Tena-Colunga, Arturo & Roldan-Islas, José & Pérez, Elsa. (2012). The March 20, 2012, Ometepec, Mexico, Earthquake. Learning From Earthquakes, EERI Special Earthquake Report. 1–9.
- ^ "Cae puente peatonal a microbús en Azcapotzalco" [Pedestrian bridge collapses on a minibus in Azcapotzalco] (in Spanish). Terra Networks. 20 March 2012. Retrieved 20 March 2012.
- ^ "Milenio: Últimas Noticias de México – Actualidad global – Grupo Milenio". Archived from the original on 19 April 2013. Retrieved 28 December 2016.
- ^ "Servicio Sismológico Nacional" [National Seismological Service] (in Spanish). National Seismological Service. National Autonomous University of Mexico. 12 July 2012. Retrieved 14 July 2012.
- Televisa Radio. 2 April 2012. Retrieved 2 April 2012.[permanent dead link]
- ^ "Nuevo temblor en la Ciudad de México; 6.0 grados" [New earthquake in Mexico City; 6.0 degrees]. Milenio (in Spanish). Grupo Multimedios. 2 April 2012. Archived from the original on 3 April 2012. Retrieved 2 April 2012.
- ^ Economista, Yuridia Torres / El. "Aseguradoras estiman $2,070 millones por daños del sismo". Retrieved 28 December 2016.
External links
- M7.4 – Oaxaca, Mexico – United States Geological Survey
- The International Seismological Centre has a bibliography and/or authoritative data for this event.