GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

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

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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 (Rapid Impact)		GDACS score
SIMULATION	0.5		0.5
usp0000rp1	Scaled population (raster)	2.46
	C1 rapid impact	-0.59
	C2 rapid impact	0.53
	Country Vulnerability	0
	INFORM_normalised	0.83

Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1517585		0.5	28 Jul 2023 07:00	7.4M, 13km	6.84	5 thousand (in MMI>=VII)	N/A	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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in Argentina ,of San Juan (population 547,865) . The alertlevel for this event is GREEN

Intensity	Population
	4600 people
	110000 people
	630000 people

Affected Provinces

Region Province	Country	Population
San Juan	Argentina	<1000 people
San Juan	Argentina	110000 people
La Rioja	Argentina	no people
San Juan	Argentina	560000 people
La Rioja	Argentina	15000 people
San Luis	Argentina	no people
Mendoza	Argentina	<1000 people
San Juan	Argentina	no people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Chucuma	San Juan	Argentina	Village	-	47 km
San Agustin del Valle Fertil	San Juan	Argentina	Village	-	53 km
Marayes	San Juan	Argentina	Village	-	63 km
Bermejo	San Juan	Argentina	Village	-	63 km
Mogna	San Juan	Argentina	Village	-	68 km
Villa del Salvador	San Juan	Argentina	Village	-	77 km
Puntilla Blanca	San Juan	Argentina	Village	-	78 km
Las Lomitas	San Juan	Argentina	Village	-	80 km
Pie de Palo	San Juan	Argentina	Village	-	82 km
Alto de Sierra	San Juan	Argentina	Village	-	84 km
Caucete	San Juan	Argentina	Village	-	85 km
Mascasín	La Rioja	Argentina	Village	-	85 km
Villa Santa Rosa	San Juan	Argentina	Village	-	95 km
Vallecito	San Juan	Argentina	Village	-	82 km
Talacasto	San Juan	Argentina	Village	-	84 km
Albardón	San Juan	Argentina	Village	-	84 km
Matagusanos	San Juan	Argentina	Village	-	86 km
Santa Lucía	San Juan	Argentina	Village	-	89 km
Adán Quiroga	San Juan	Argentina	Village	-	89 km
San Juan	San Juan	Argentina	City	440000 people	92 km
Punta del Agua	San Juan	Argentina	Village	-	96 km
Tucunuco	San Juan	Argentina	Village	-	96 km
Marquesado	San Juan	Argentina	Village	-	99 km
Las Casuarinas	San Juan	Argentina	Village	-	102 km
Rivadavia	San Juan	Argentina	Village	-	102 km
Aberastain	San Juan	Argentina	Village	-	103 km
Niquivil Viejo	San Juan	Argentina	Village	-	107 km
Chepes	La Rioja	Argentina	Village	-	118 km
Media Agua	San Juan	Argentina	Village	-	122 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

Intensity	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.

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.