Overall Green Earthquake alert Off-shore on 21 Sep 2002 21:26 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 4.1 Off-shore on 21 Sep 2002 21:26 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:	4.1M
Depth:	12 Km
Lat/Lon:	33.23 , -116.11
Event Date:	21 Sep 2002 21:26 UTC
Exposed Population:
Source:	NEIC
Inserted at:	01 Jan 1900 00:00 UTC

GDACS Score

For more info on GDACS alert score click here.

	Earthquake		GDACS score
NEIC	0.5		0.5
	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
352		0.5	21 Sep 2002 21:26	4.1M, 12km	N/A	No people affected (in 100km)		-21:-26	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 United States , State of California (population 30,971,320) . The nearest places are Salton City, Ocotillo Wells, Truckhaven, Coolidge Springs, Desert Lodge, Oasis, Silver Dons Mobile Home Park, Borrego Springs, Kane Spring, and Hellhole Palms.

Radius	Population
100 km	1.2 million people
75 km	420000 people
50 km	85000 people
20 km	4400 people
10 km	<1000 people
5 km	<1000 people
2 km	no people

Affected Provinces

Region Province	Country	Population
California	United States	31 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Salton City	California	United States	Village	<1000 people	13 km
Ocotillo Wells	California	United States	Village	-	13 km
Truckhaven	California	United States	Village	-	13 km
Coolidge Springs	California	United States	Village	-	16 km
Desert Lodge	California	United States	Village	-	21 km
Oasis	California	United States	Village	-	22 km
Silver Dons Mobile Home Park	California	United States	Village	-	24 km
Borrego Springs	California	United States	Village	2500 people	25 km
Kane Spring	California	United States	Village	-	31 km
Hellhole Palms	California	United States	Village	-	31 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
Ocotillo		49				0	12 km
Salton Sea	SAS	-26	Civ.	Unpaved	No	5000	15 km
Borrego Air Ranch		175				0	17 km
Borrego Valley	BXS	158				0	20 km
Landells		287				0	32 km
Desert Air Sky Ranch		unknown				0	33 km
Hunt's Sky Ranch		704				0	37 km
Agua Caliente Springs		372				0	38 km
Thermal	TRM	-36	Civ.	Paved	Yes	6800	41 km
Rancho Vallecito		512				0	43 km
John F Kennedy Memorial Hospital		unknown				0	51 km
Warner Springs Gliderport		879				0	53 km
Kelly		219				0	54 km
Bermuda Dunes	UDD	22	Civ.	Paved	Yes	5000	56 km
Calipatria Municipal	CLR	-55	Civ.	Paved	No	3400	57 km
Emory Ranch		146				0	57 km
Chiriaco Summit		522				0	58 km
Hoffman (Private)		945				0	61 km
Pioneers Memorial Hospital		-30				0	62 km
Eisenhower Medical Center		71				0	62 km
Brawley Municipal	BWC	-39	Civ.	Paved	Yes	4400	63 km
El Centro Naf	NJK	-13	Mil.	Paved	Yes	9500	63 km
Flying T Ranch		762				0	63 km
Loma Madera Ranch		1029				0	64 km
Julian Hinds Pump Plant Airstrip		407				0	66 km
Imperial County	IPL	-17	Civ.	Paved	Yes	5300	69 km
Lake Riverside Estates		1039				0	70 km
Ward Ranch		762				0	71 km
Jacumba		860				0	72 km
Palm Springs Regional	PSP	141	Civ.	Paved	Yes	9300	73 km
Douthitt Strip		14				0	75 km
Ramona		425	Civ.	Paved	Yes	4000	79 km
On The Rocks		808				0	79 km
Hoag		503				0	80 km
Ernst Field		872				0	81 km
Lyall-Roberts		282				0	82 km
Johnson Brothers		0				0	83 km
Lake Wohlford Resort		501				0	84 km
Reider Ranch		809				0	85 km
Calexico International	CXL	1	Civ.	Paved	No	4500	86 km
Devers Substation		351				0	87 km
Moronga Basin Chp		757				0	98 km
Twentynine Palms	TNP	581	Civ.	Paved	Yes	5500	98 km

Dams

Reservoir	Dam Name	River	Year	Distance
	Cuyamaca	Boulder Creek	1887	54 km
Lake Henshaw	Henshaw	San Luis Rey River	1923	61 km
	Sutherland	Santa Ysabel Creek	1954	65 km
	Lake Hemet	Trib. San Jacinto River	1895	71 km
	Morena	Cottonwood Creek	1912	76 km
	El Capitan	San Diego River	1934	77 km
	Lake Loveland	Sweetwater River	1945	82 km
	Barrett	Cottonwood Creek	1922	83 km
	Vail	Temecula Creek	1949	85 km
Lake Jennings	Chet Harritt	Quail Can Creek	1962	85 km
	San Vicente	San Vicente Creek	1943	85 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.