M 7.7 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: 7.7M
Depth: 10 Km
Lat/Lon: 16.79 , -98.22
Event Date: 20 Mar 2012 18:02 UTC
20 Mar 2012 12:02 Local
Exposed Population: 1140000 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 1.5 1 1.5
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 Guerrero (population 2,867,451) . The nearest places are Xochistlahuaca, Tlacoachixtlahuaca, Huehuetono, San Cristóbal, La Soledad, Huanjintepec, Cacahuatepec, Ometepec, Coyul, Zacatepec, and Montaña.

Radius Population
100 km 1.1 million people
75 km 710000 people
50 km 350000 people
20 km 61000 people
10 km 24000 people
5 km 9300 people
2 km 1600 people

Affected Provinces

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

Affected populated places

Name Region Province Country City class Population Distance
Xochistlahuaca Guerrero Mexico Village 3500 people 2 km
Tlacoachixtlahuaca Guerrero Mexico Village - 8 km
Huehuetono Guerrero Mexico Village - 10 km
San Cristóbal Guerrero Mexico Village - 19 km
La Soledad Guerrero Mexico Village - 19 km
Huanjintepec Guerrero Mexico Village - 21 km
Cacahuatepec Oaxaca Mexico Village 3600 people 21 km
Ometepec Guerrero Mexico Village 18000 people 22 km
Coyul Oaxaca Mexico Village - 24 km
Zacatepec Oaxaca Mexico Village 4400 people 25 km
Ipalapa Oaxaca Mexico Village - 26 km
Piedra Ancha Guerrero Mexico Village - 27 km
San Juan Bautista lo de Soto Oaxaca Mexico Village - 28 km
Alto de las Mesas Oaxaca Mexico Village - 28 km
Acatepec Guerrero Mexico Village - 28 km
Cuitlapa Guerrero Mexico Village - 31 km
Laguna Guerrero Mexico Village - 33 km
Vista Hermosa Guerrero Mexico Village - 34 km
Huanacastle Oaxaca Mexico Village - 34 km
Amole Oaxaca Mexico Village - 35 km
Quetzalapa Guerrero Mexico Village - 38 km
Ocote Guerrero Mexico Village - 39 km
Igualapa Guerrero Mexico Village - 40 km
Putla de Guerrero Oaxaca Mexico Village - 40 km
Cuajinicuilapa Guerrero Mexico Village 9300 people 41 km
La Reforma Oaxaca Mexico Village - 44 km
Chixlixtlahuaca Guerrero Mexico Village - 44 km
Metlatonoc Guerrero Mexico Village - 45 km
Jicayan Oaxaca Mexico Village 4200 people 45 km
Jicaltepec Oaxaca Mexico Village - 46 km
Asunción Atoyaquillo Oaxaca Mexico Village - 47 km
Itunyaso Oaxaca Mexico Village - 47 km
Lo de Liborio Oaxaca Mexico Village - 48 km
Copala Oaxaca Mexico Village - 51 km
Iliatenco Guerrero Mexico Village - 51 km
Zitlaltepec Guerrero Mexico Village - 52 km
San Nicolás Guerrero Mexico Village - 52 km
Cuevas Oaxaca Mexico Village - 52 km
Santiago Oaxaca Mexico Village - 53 km
Pinotepa Oaxaca Mexico Village - 53 km
San Cristóbal Oaxaca Mexico Village - 53 km
Armenta Oaxaca Mexico Village - 54 km
San Luis Acatlan Guerrero Mexico Village - 54 km
Ciruelo Oaxaca Mexico Village - 54 km
Las Conchitas Oaxaca Mexico Village - 55 km
Azoyú Guerrero Mexico Village 4200 people 55 km
Nuyoc Oaxaca Mexico Village - 56 km
Moyotepec Guerrero Mexico Village - 57 km
San Martín Peras Oaxaca Mexico Village - 57 km
Tierra Colorada Guerrero Mexico Village - 58 km
Cabacera Nueva Oaxaca Mexico Village - 60 km
Alcozauca Guerrero Mexico Village - 61 km
Pie Cerro Oaxaca Mexico Village - 62 km
Chicahuaxtla Oaxaca Mexico Village - 63 km
San Andres Oaxaca Mexico Village - 63 km
Loma Larga Oaxaca Mexico Village - 64 km
Justlahuaca Oaxaca Mexico Village - 65 km
Ixtayutla Oaxaca Mexico Village - 65 km
Santiago Oaxaca Mexico Village - 65 km
Atlamajaicingo Guerrero Mexico Village - 66 km
Achiotes Oaxaca Mexico Village - 66 km
Marquelia Guerrero Mexico Village 6800 people 67 km
El Cacao Oaxaca Mexico Village - 68 km
Chalcalongo Oaxaca Mexico Village - 68 km
Montaña Oaxaca Mexico Village - 69 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 41 km
Pinotepa Nacional PNO unknown 0 51 km
Tlaxiaco 2045 0 76 km

More information

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