M 5.5 in Mexico on 31 Jul 2021 15:39 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

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

Earthquake Magnitude: 5.5M
Depth: 10 Km
Lat/Lon: 27.5416 , -111.5183
Event Date: 31 Jul 2021 15:39 UTC
31 Jul 2021 08:39 Local
Exposed Population: 170000 people within 100km
Source: NEIC us6000f109
Inserted at: 31 Jul 2021 17:10 UTC
INFORM Coping capacity of the alert score
4.4 (Mexico)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us6000f109 Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.92  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1388624 0 31 Jul 2021 15:39 5.5M, 10km 4.13 N/A (in MMI>=VII) 00:15 NEIC
1388633 0 31 Jul 2021 15:39 5.5M, 10km 4.22 N/A (in MMI>=VII) 01:30 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 Sonora (population 1,983,593) . The nearest places are and San Carlos.

Radius Population
100 km 180000 people
75 km 79000 people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Sonora Mexico 2 million people
Baja California Sur Mexico 350000 people
Baja California Mexico 1.8 million people
Chihuahua Mexico 2.7 million people
Sinaloa Mexico 2.4 million people
Arizona United States 3.8 million people
New Mexico United States 1.6 million people
Durango Mexico 1.5 million people

Affected populated places

Name Region Province Country City class Population Distance
San Carlos Sonora Mexico Village - 66 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
Punta Chivato PCV unknown 0 70 km
General Jose Maria Yanez International GYM 27 Civ. Paved Yes 7700 75 km
Punta Chivato Bulge 2 0 76 km
Santa Rosalia SRL unknown 0 78 km
Mulege MUG 61 0 87 km

Ports

Name LOCODE Country Distance
San Marcos Island MXSMI Mexico 67 km
Guaymas MXGYM Mexico 76 km
Santa Rosalia MXSRL Mexico 77 km
Empalme Mexico 82 km
Muleje Mexico 87 km

More information

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