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: 27.6146 , -111.5085
Event Date: 31 Jul 2021 15:39 UTC
31 Jul 2021 08:39 Local
Exposed Population: 180000 people within 100km
Source: NEIC us6000f109
Inserted at: 31 Jul 2021 15:55 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.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


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 ,of Sonora (population 217,071) . The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1388624 27.615/-111.508 5.5 10.0 4.12 31 Jul 2021 15:57 00:18 (new episode)
2 0 1388624 27.615/-111.508 5.5 10.0 4.126 31 Jul 2021 16:47 01:08 (upd of #1)
3 0 1388633 27.542/-111.518 5.5 10.0 4.219 31 Jul 2021 17:43 02:04 (new episode)
4 0 1388633 27.542/-111.518 5.5 10.0 4.219 01 Aug 2021 15:43 1d 00:04 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Sonora Mexico 220000 people
Baja California Sur Mexico 1300 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
San Carlos Sonora Mexico Village - 60 km
Guaymas Sonora Mexico City 100000 people 70 km
Hacienda El Pardo Sonora Mexico Village - 74 km
Empalme Sonora Mexico City 38000 people 79 km
San Bruno Baja California Sur Mexico Village - 80 km
Aguila Sonora Mexico Village - 85 km
Tastiota Sonora Mexico Village - 85 km
Maytorena Sonora Mexico Village - 91 km
Pitahaya Sonora Mexico Village - 96 km
Cieneguita Sonora Mexico Village - 98 km
Rancho Los Gatos Sonora Mexico Village - 100 km
Guásimas Sonora Mexico Village - 101 km
Cholay Sonora Mexico Village - 107 km
San Rafael Sonora Mexico Village - 107 km
Liliba Sonora Mexico Village - 108 km
Oritz Sonora Mexico Village - 108 km
Potam Sonora Mexico Village 5900 people 109 km
Oronio Sonora Mexico Village - 117 km
Sifón de los Pinos Sonora Mexico Village - 121 km
Colonia Militar Sonora Mexico Village - 127 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
General Jose Maria Yanez International GYM 27 Civ. Paved Yes 7700 70 km
Punta Chivato PCV unknown 0 76 km
Punta Chivato Bulge 2 0 82 km

Ports

Intensity Name LOCODE Country Distance
Guaymas MXGYM Mexico 71 km
San Marcos Island MXSMI Mexico 73 km
Empalme Mexico 77 km

More information

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