M 7.4 in Mexico on 20 Mar 2012 18:02 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a medium humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 7.4M
Depth: 20 Km
Lat/Lon: 16.662 , -98.188
Event Date: 20 Mar 2012 18:02 UTC
20 Mar 2012 12:02 Local
Exposed Population: 220000 people in MMI
980000 people within 100km
Source: NEIC usc0008m6h
Inserted at: 02 Feb 2017 13:09 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 1.3 0 1.3
usc0008m6h Scaled population (vector) n.a Max wave scenario 0m  
  C1 earthquake n.a Max wave realtime 0m  
  C2 earthquake n.a      
  Country Vulnerability n.a      
  INFORM_normalised n.a      
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
115596 1.5 20 Mar 2012 18:02 7.7M, 10km N/A 1.1 million (in 100km) 0m (at 00:00) 1779d 19:06 NEIC
115597 1.6 20 Mar 2012 18:02 7.9M, 10km N/A 1.3 million (in 100km) 0m (at 00:00) 1779d 19:06 NEIC
115599 1.4 20 Mar 2012 18:02 7.6M, 17.5km N/A 980 thousand (in 100km) 0m (at 03:38) 1779d 19:06 NEIC
115601 1.3 20 Mar 2012 18:02 7.4M, 20km 7.7 220 thousand (in MMI>=VII) 0m (at 00:00) 1779d 19:06 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in Mexico , State of Oaxaca (population 3,329,574) . The nearest places are Cacahuatepec, Huanjintepec, Alto de las Mesas, Xochistlahuaca, San Juan Bautista lo de Soto, Ipalapa, Tlacoachixtlahuaca, Piedra Ancha, Huanacastle, Ometepec, and Cumbre.

Radius Population
100 km 980000 people
75 km 650000 people
50 km 380000 people
20 km 62000 people
10 km 12000 people
5 km 2100 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Oaxaca Mexico 3.3 million people
Guerrero Mexico 2.9 million people

Affected populated places

Name Region Province Country City class Population Distance
Cacahuatepec Oaxaca Mexico Village 3600 people 7 km
Huanjintepec Guerrero Mexico Village - 8 km
Alto de las Mesas Oaxaca Mexico Village - 14 km
Xochistlahuaca Guerrero Mexico Village 3500 people 15 km
San Juan Bautista lo de Soto Oaxaca Mexico Village - 15 km
Ipalapa Oaxaca Mexico Village - 17 km
Tlacoachixtlahuaca Guerrero Mexico Village - 20 km
Piedra Ancha Guerrero Mexico Village - 20 km
Huanacastle Oaxaca Mexico Village - 22 km
Ometepec Guerrero Mexico Village 18000 people 22 km
La Soledad Guerrero Mexico Village - 23 km
Zacatepec Oaxaca Mexico Village 4400 people 24 km
Huehuetono Guerrero Mexico Village - 25 km
San Cristóbal Guerrero Mexico Village - 31 km
Vista Hermosa Guerrero Mexico Village - 32 km
Cuajinicuilapa Guerrero Mexico Village 9300 people 32 km
Jicayan Oaxaca Mexico Village 4200 people 32 km
Coyul Oaxaca Mexico Village - 33 km
Acatepec Guerrero Mexico Village - 33 km
Lo de Liborio Oaxaca Mexico Village - 33 km
Amole Oaxaca Mexico Village - 36 km
La Reforma Oaxaca Mexico Village - 37 km
Pinotepa Oaxaca Mexico Village - 39 km
Ciruelo Oaxaca Mexico Village - 40 km
Armenta Oaxaca Mexico Village - 41 km
Santiago Oaxaca Mexico Village - 42 km
San Cristóbal Oaxaca Mexico Village - 43 km
Igualapa Guerrero Mexico Village - 44 km
San Nicolás Guerrero Mexico Village - 45 km
Las Conchitas Oaxaca Mexico Village - 45 km
Cuitlapa Guerrero Mexico Village - 45 km
Laguna Guerrero Mexico Village - 45 km
Asunción Atoyaquillo Oaxaca Mexico Village - 46 km
Quetzalapa Guerrero Mexico Village - 46 km
Pie Cerro Oaxaca Mexico Village - 48 km
Putla de Guerrero Oaxaca Mexico Village - 49 km
San Andres Oaxaca Mexico Village - 49 km
Jicaltepec Oaxaca Mexico Village - 51 km
Ocote Guerrero Mexico Village - 51 km
Achiotes Oaxaca Mexico Village - 51 km
Tierra Colorada Guerrero Mexico Village - 54 km
Itunyaso Oaxaca Mexico Village - 54 km
El Cacao Oaxaca Mexico Village - 56 km
Chixlixtlahuaca Guerrero Mexico Village - 58 km
Ixtayutla Oaxaca Mexico Village - 58 km
Jamiltepec Oaxaca Mexico City 9800 people 58 km
Azoyú Guerrero Mexico Village 4200 people 58 km
Metlatonoc Guerrero Mexico Village - 60 km
San Luis Acatlan Guerrero Mexico Village - 60 km
Nuyoc Oaxaca Mexico Village - 61 km
Cabacera Nueva Oaxaca Mexico Village - 61 km
Iliatenco Guerrero Mexico Village - 61 km
Chico Ometepec Oaxaca Mexico Village - 61 km
Copala Oaxaca Mexico Village - 62 km
Zitlaltepec Guerrero Mexico Village - 64 km
Cuevas Oaxaca Mexico Village - 66 km
Pueblo Viejo Oaxaca Mexico Village - 66 km
Marquelia Guerrero Mexico Village 6800 people 67 km
El Platanillo Oaxaca Mexico Village - 68 km
Moyotepec Guerrero Mexico Village - 68 km
Cumbre Oaxaca Mexico Village - 68 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Ta lo de Soto 149 0 31 km
Pinotepa Nacional PNO unknown 0 37 km
Tlaxiaco 2045 0 83 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.