M 7.4 in Argentina on 28 Jul 2023 07:00 UTC
*** EXERCISE *** EXERCISE *** EXERCISE *** EXERCISE ***

Hazard models

Rapid Impact
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: 13 Km
Lat/Lon: -31.028 , -67.767
Event Date: 28 Jul 2023 07:00 UTC
28 Jul 2023 04:00 Local
Exposed Population: 1.4 million (in MMI>=VII)
Source: SIMULATION usp0000rp1
Inserted at: 28 Jul 2023 08:24 UTC
INFORM Coping capacity of the alert score
3.7 (Argentina)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
SIMULATION 1.9 1.9
usp0000rp1 Scaled population (raster) 5.63  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.83  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1517585 1.9 28 Jul 2023 07:00 7.4M, 13km 9.45 1.4 million (in MMI>=VII) 01:24 SIMULATION
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 Argentina , Province of San Juan (population 217) . The nearest places are Ampacama, Las Chacras, Las Juntas, Astica, Las Tumayas, La Huerta, El Chañar, Chucuma, Santo Domingo, San Agustin del Valle Fertil, and Mogna.

Radius Population
100 km 610000 people
75 km 14000 people
50 km 1700 people
20 km <1000 people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
San Juan Argentina <1000 people

Affected populated places

Name Region Province Country City class Population Distance
Ampacama San Juan Argentina Village - 18 km
Las Chacras San Juan Argentina Village - 34 km
Las Juntas San Juan Argentina Village - 37 km
Astica San Juan Argentina Village - 38 km
Las Tumayas San Juan Argentina Village - 39 km
La Huerta San Juan Argentina Village - 44 km
El Chañar San Juan Argentina Village - 45 km
Chucuma San Juan Argentina Village - 47 km
Santo Domingo San Juan Argentina Village - 49 km
San Agustin del Valle Fertil San Juan Argentina Village - 53 km
Usno San Juan Argentina Village - 56 km
Nikizanga San Juan Argentina Village - 60 km
Marayes San Juan Argentina Village - 63 km
Bermejo San Juan Argentina Village - 63 km
Mogna San Juan Argentina 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
La Laja 650 0 76 km
San Juan UAQ 597 Civ. Paved Yes 8000 87 km
San Juan Aeroclub 634 0 98 km

Dams

Reservoir Dam Name River Year Distance
Quebrada de Ullum San Juan 1981 98 km

More information

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