Overall Green Earthquake alert in Chile on 20 Sep 2012 10:07 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 4.7 in Chile on 20 Sep 2012 10:07 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:	4.7M
Depth:	17.5 Km
Lat/Lon:	-34.2707 , -72.2261
Event Date:	20 Sep 2012 10:07 UTC 20 Sep 2012 07:07 Local
Exposed Population:	390000 people within 100km
Source:	NEIC usc000csgn
Inserted at:	20 Sep 2012 10:29 UTC

GDACS Score

For more info on GDACS alert score click here.

	Earthquake		GDACS score
NEIC	0.5		0.5
usc000csgn	Scaled population (vector)	n.a
	C1 earthquake	n.a
	C2 earthquake	n.a
	Country Vulnerability	n.a
	INFORM_normalised	n.a

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
119738		0.5	20 Sep 2012 10:07	4.7M, 17.5km	N/A	390 thousand (in 100km)		00:22	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 Chile , Region of Libertador General Bernardo O'Higgins (population 718,504) .

Radius	Population
100 km	370000 people
75 km	87000 people
50 km	24000 people
20 km	no people
10 km	no people
5 km	no people
2 km	no people

Affected Provinces

Country	Region Province	Population
Chile	Libertador General Bernardo O'Higgins	720000 people
Chile	Valparaiso	1.4 million people
Chile	Maule	860000 people
Chile	Region Metropolitana	5.2 million people

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
Rapelhuapi		149	Priv.	Unpaved	No	3200	70 km

Ports

Name	LOCODE	Country	Distance
San Antonio	CLSAI	Chile	94 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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