Overall Green Earthquake alert in Mexico on 31 Mar 2021 08:56 UTC

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 4.75 in Mexico on 31 Mar 2021 08:56 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:	4.8M
Depth:	19.38 Km
Lat/Lon:	32.3805008 , -115.2463303
Event Date:	31 Mar 2021 08:56 UTC 31 Mar 2021 01:56 Local
Exposed Population:	1.6 million in 100km
Source:	CALTECH ci39596135
Inserted at:	09 Nov 2021 16:01 UTC
INFORM Coping capacity of the alert score	4.4 (Mexico)
INFORM Coping capacity of the affected contries:	Mexico= 4.4; United States= 2.2

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
CALTECH	0		0
ci39596135	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

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1367855		0	31 Mar 2021 08:56	4.75M, 19.38km	4.28	N/A (in MMI>=VII)		223d 07:04	CALTECH

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 Baja California (population 1,806,829) . The nearest places are Hidalgo, Ejido Patzcuaro, Durango, Guadalupe Victoria, Colonia Dos Tubos, Ejido Guanajuato, Polvora, Sesbania, Colonia Elias, Bateques, and Winterhaven.

Radius	Population
100 km	1.6 million people
75 km	1.5 million people
50 km	1.3 million people
20 km	140000 people
10 km	41000 people
5 km	3300 people
2 km	<1000 people

Affected Provinces

Region Province	Country	Population
Baja California	Mexico	1.8 million people
Sonora	Mexico	2 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Hidalgo	Baja California	Mexico	Village	-	5 km
Ejido Patzcuaro	Baja California	Mexico	Village	-	6 km
Durango	Baja California	Mexico	Village	-	15 km
Guadalupe Victoria	Baja California	Mexico	Village	18000 people	17 km
Colonia Dos Tubos	Baja California	Mexico	Village	-	17 km
Ejido Guanajuato	Baja California	Mexico	Village	-	18 km
Polvora	Baja California	Mexico	Village	-	19 km
Sesbania	Baja California	Mexico	Village	-	20 km
Colonia Elias	Baja California	Mexico	Village	-	23 km
Bateques	Baja California	Mexico	Village	-	26 km
Puerto Asufre	Baja California	Mexico	Village	-	27 km
Alberto Oviedo	Baja California	Mexico	Village	-	28 km
Ejido Mexico	Baja California	Mexico	Village	-	30 km
Estacion Coahuila	Sonora	Mexico	Village	6800 people	31 km
Tecolote	Baja California	Mexico	Village	-	32 km
Calavera	Sonora	Mexico	Village	-	34 km
Bonds Corner	California	United States	Village	-	36 km
Riíto	Sonora	Mexico	Village	-	36 km
Mexicali	Baja California	Mexico	Major city	600000 people	37 km
Rancho de Mis Recuerdos	Baja California	Mexico	Village	-	38 km
Pozo Cenizo	Baja California	Mexico	Village	-	40 km
Colonia Miguel Alemán	Baja California	Mexico	Village	-	40 km
Calexico	California	United States	Village	27000 people	40 km
Chapultepec	Sonora	Mexico	Village	-	42 km
Rancho del Pinocho	Baja California	Mexico	Village	-	45 km
Cheque Número	Sonora	Mexico	Village	-	46 km
Date City	California	United States	Village	-	46 km
Cuervos	Baja California	Mexico	Village	8300 people	46 km
San Luis	Sonora	Mexico	Village	15000 people	47 km
Coyote	Baja California	Mexico	Village	-	47 km
Heber	California	United States	Village	3000 people	47 km
Rancho Linch	Baja California	Mexico	Village	-	48 km
Gadsden	Arizona	United States	Village	<1000 people	48 km
El Centinela	Baja California	Mexico	Village	-	49 km
Rico	California	United States	Village	-	49 km
Mt. Signal	California	United States	Village	-	49 km
Holtville	California	United States	Village	5600 people	50 km
Meloland	California	United States	Village	-	51 km
Anza	California	United States	Village	-	52 km
La Esperanza	Sonora	Mexico	Village	-	54 km
El Centro	California	United States	Village	38000 people	54 km
Perrys Corner	California	United States	Village	-	55 km
Fuller	California	United States	Village	-	55 km
Somerton	Arizona	United States	Village	7300 people	56 km
Carrizo	Baja California	Mexico	Village	-	56 km
Wilsie	California	United States	Village	-	57 km
Algodones	Baja California	Mexico	Village	4800 people	57 km
Sandia	California	United States	Village	-	58 km
Imperial	California	United States	Village	7600 people	60 km
Ogilby	California	United States	Village	-	62 km
Seeley	California	United States	Village	1600 people	62 km
Andrade	California	United States	Village	-	62 km
Cactus	California	United States	Village	-	63 km
Curlew	California	United States	Village	-	63 km
Steam	Arizona	United States	Village	-	64 km
Edgar	California	United States	Village	-	64 km
Araz Junction	California	United States	Village	-	64 km
Agua Matías	Baja California	Mexico	Village	-	65 km
Clyde	California	United States	Village	-	65 km
Ruthven	California	United States	Village	-	67 km
Dixieland	California	United States	Village	-	68 km
Orita	California	United States	Village	-	68 km
El Doctor	Sonora	Mexico	Village	-	68 km
Obregon	California	United States	Village	-	68 km
Yuma	Arizona	United States	Village	78000 people	69 km
Alamorio	California	United States	Village	-	69 km
Winterhaven	California	United States	Village	<1000 people	70 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
Mexicali	MXL	22	Civ.	Paved	Yes	8500	28 km
Calexico International	CXL	1	Civ.	Paved	No	4500	41 km
San Luis Rio Colorado	UAC	15				0	43 km
Johnson Brothers		0				0	44 km
Holtville		18				0	51 km
Douthitt Strip		14				0	53 km
Rolle Airfield		50				0	54 km
Imperial County	IPL	-17	Civ.	Paved	Yes	5300	59 km
Somerton		54				0	60 km
Checkerboard		59				0	60 km
El Centro Naf	NJK	-13	Mil.	Paved	Yes	9500	64 km
Yuma Regional Medical Center		61				0	67 km
Yuma Mcas Yuma International	YUM	65	Civ.	Paved	Yes	13300	68 km
Pioneers Memorial Hospital		-30				0	70 km
Brawley Municipal	BWC	-39	Civ.	Paved	Yes	4400	73 km
Emory Ranch		146				0	83 km
Calipatria Municipal	CLR	-55	Civ.	Paved	No	3400	87 km
Jacumba		860				0	90 km
Laguna AAF	LGF	129	Mil.	Paved	Yes	6100	96 km

Dams

Reservoir	Dam Name	River	Year	Distance
Senator Wash	Senator Wash	Senator Wash	1965	92 km

More information

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

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