M 5.4 - GREATER LOS ANGELES AREA, CALIFORNIA

Tuesday, July 29, 2008 at 18:42:15 UTC
Location: 34.0°N 117.8°W Depth: 15km

Summary

Estimated Population Exposed to Earthquake Shaking

Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Potential Structure Damage
Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Resistant	Vulnerable
X	0	Extreme	V. Heavy	V. Heavy
IX	0	Violent	Heavy	V. Heavy
VIII	0	Severe	Moderate/Heavy	Heavy
VII	0	Very Strong	Moderate	Moderate/Heavy
VI	1,172k	Strong	Light	Moderate
V	10,408k	Moderate	V. Light	Light
IV	10,060k*	Light	None	None
II-III	607k*	Weak	None	None
I	--*	Not Felt	None	None

*Estimated exposure only includes population within the map area.

Population Exposure

Population per ˜1 square km from Landscan 2005

Selected City Exposure

MMI	City	Population
VI	Chino Hills	66k
VI	Pomona	156k
VI	Diamond Bar	58k
VI	Yorba Linda	64k
VI	Walnut	31k
VI	Brea	39k
VI	Placentia	49k
V	Los Angeles	3694k
V	Long Beach	482k
IV	San Diego	1223k
IV	Tijuana	1376k

Shaking Intensity

MMI

Overall, the population in this region resides in structures that are resistant to earthquake shaking, though some vulnerable structures exist. A magnitude 5.9 earthquake 37 km Northeast of this one struck Whittier Narrows, California on October 01, 1987 (UTC), with estimated population exposures of 20,000 at intensity VIII and 1,292,000 at intensity VII, resulting in an estimated 8 fatalities. On January 17, 1994 (UTC), a magnitude 6.7 earthquake 78 km Northeast of this one struck Northridge, California, with estimated population exposures of 211,000 at intensity IX or greater and 1,968,000 at intensity VIII, resulting in an estimated 60 fatalities. Recent earthquakes in this area have caused, landslides and liquefaction that may have contributed to losses.

PAGER results are generally available on the Internet within 30 minutes of the earthquake's occurrence. However, information on the extent of shaking will be uncertain in the minutes and hours following an earthquake and typically improves as additional sensor data and reported intensities are acquired and incorporated into models of the earthquake's source. Users of PAGER exposure estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.

Maps

[Population | Shakemap]

Map of MMI contours plotted over population per ˜1 square km (see gray scale bar on top of map). The regions of integer MMI values are separated by the thick contour lines and labeled with Roman numerals. The total population exposure to a given MMI value is obtained by summing the population between the thick contour lines. This total is shown in population exposure table.

Map of shaking intensity. This map shows the estimated MMI as a continuous color scale. The ground shaking estimates can be obtained from http://earthquake.usgs.gov/shakemap/.

Exposure

Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Potential Structure Damage
Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Resistant	Vulnerable
X	0	Extreme	V. Heavy	V. Heavy
IX	0	Violent	Heavy	V. Heavy
VIII	0	Severe	Moderate/Heavy	Heavy
VII	0	Very Strong	Moderate	Moderate/Heavy
VI	1,172k	Strong	Light	Moderate
V	10,408k	Moderate	V. Light	Light
IV	10,060k*	Light	None	None
II-III	607k*	Weak	None	None
I	--*	Not Felt	None	None

*Estimated exposure only includes population within the map area.

Table showing population exposed to different estimated Modified Mercalli Intensity (MMI) levels and the possible damage at different intensity levels for resistant and vulnerable structures. MMI describes the severity of an earthquake in terms of its effect on humans and structures and is a rough measure of the amount of shaking at a given location. Unlike earthquake magnitude, intensity varies with distance from the fault, and is influenced by the depth of the earthquake and the types of soils in the shaken region. Population outside the map bounds are not included in the totals.

Cities

MMI	City	Population
VI	Chino Hills	66k
VI	Pomona	156k
VI	Diamond Bar	58k
VI	Yorba Linda	64k
VI	Walnut	31k
VI	Brea	39k
VI	Placentia	49k
VI	Chino	75k
VI	Los Serranos	7k
VI	Fullerton	135k
VI	San Dimas	36k
VI	La Verne	33k
VI	Covina	48k
VI	Charter Oak	9k
VI	South San Jose Hills	21k
VI	Montclair	35k
VI	Claremont	35k
VI	Valinda	23k
V	West Covina	109k
V	La Habra	59k
V	Ontario	172k
V	Anaheim	328k
V	La Puente	42k
V	Rowland Heights	52k
V	La Habra Heights	6k
V	Hacienda Heights	54k
V	Stanton	37k
V	Citrus	11k
V	Whittier	85k
V	West Puente Valley	24k
V	Glendora	51k
V	Cypress	47k
V	South Whittier	58k
V	East La Mirada	9k
V	Villa Park	6k
V	Corona	152k
V	Home Gardens	10k
V	Buena Park	79k
V	Garden Grove	167k
V	El Cerrito	4k
V	Norco	27k
V	La Palma	16k
V	Avocado Heights	15k
V	Upland	74k
V	Westminster	89k
V	Pico Rivera	66k
V	Santa Fe Springs	16k
V	La Mirada	49k
V	Baldwin Park	80k
V	Irwindale	1k
V	Orange	128k
V	Los Alamitos	11k
V	Hawaiian Gardens	15k
V	Cerritos	53k
V	Bell Gardens	46k
V	Montebello	64k
V	Downey	111k
V	Commerce	13k
V	Norwalk	109k
V	Artesia	16k
V	Rossmoor	10k
V	Maywood	28k
V	Bell	38k
V	Mira Loma	18k
V	East Los Angeles	125k
V	Cudahy	25k
V	Belvedere	2k
V	Bellflower	75k
V	North Tustin	24k
V	Santa Ana	343k
V	Glen Avon	16k
V	Pedley	12k
V	Azusa	48k
V	Monterey Park	63k
V	Fountain Valley	56k
V	Tustin	68k
V	Seal Beach	24k
V	Paramount	57k
V	South Gate	99k
V	Huntington Park	63k
V	South El Monte	22k
V	Lakewood	82k
V	Walnut Park	17k
V	Rancho Cucamonga	168k
V	Sunnyslope	4k
V	Alhambra	88k
V	South Pasadena	24k
V	South San Gabriel	7k
V	El Monte	125k
V	Lynwood	72k
V	East Compton	10k
V	San Gabriel	41k
V	Rubidoux	32k
V	Costa Mesa	108k
V	Pasadena	144k
V	Huntington Beach	195k
V	Bloomington	22k
V	Rosemead	56k
V	Lake Elsinore	40k
V	Riverside	297k
V	Fontana	169k
V	San Antonio Heights	3k
V	Newport Beach	78k
V	Lakeland Village	5k
V	Sedco Hills	3k
V	San Marino	13k
V	Canyon Lake	11k
V	Loma Linda	20k
V	Signal Hill	10k
V	Compton	96k
V	La Canada Flintridge	21k
V	Los Angeles	3694k
V	Woodcrest	8k
V	Colton	52k
V	Long Beach	482k
V	Quail Valley	1k
V	Aliso Viejo	41k
V	Laguna Woods	19k
V	Altadena	43k
V	Lake Forest	76k
V	Wildomar	16k
V	Lakeview	1k
V	Grand Terrace	12k
V	North El Monte	3k
V	Laguna Beach	24k
V	Temple City	37k
V	Willowbrook	35k
V	West Hollywood	37k
V	San Juan Capistrano	35k
V	Laguna Hills	30k
V	Glendale	194k
V	East Pasadena	6k
V	San Bernardino	202k
V	Mission Viejo	96k
V	North Glendale	203k
V	Laguna Niguel	66k
V	San Joaquin Hills	3k
V	Dana Point	35k
V	Foothill Ranch	11k
V	Wrightwood	4k
V	Mayflower Village	5k
IV	Rialto	101k
IV	Beverly Hills	35k
IV	Westmont	32k
IV	Highgrove	3k
IV	San Fernando	24k
IV	Nuevo	4k
IV	Calabasas	21k
IV	Portola Hills	9k
IV	Hidden Hills	2k
IV	Santa Clarita	168k
IV	Burbank	104k
IV	Duarte	22k
IV	Bradbury	1k
IV	West Compton	5k
IV	Sun City	19k
IV	Perris	46k
IV	Las Flores	5k
IV	Trabuco Canyon	3k
IV	Irvine	189k
IV	West Athens	9k
IV	Carson	95k
IV	Westwood	2k
IV	Rancho Santa Margarita	51k
IV	Sierra Madre	11k
IV	Arcadia	56k
IV	Littlerock	1k
IV	Hemet	69k
IV	Moreno Valley	168k
IV	San Clemente	62k
IV	West Carson	21k
IV	Monrovia	38k
IV	San Jacinto	29k
IV	Agoura Hills	22k
IV	Agoura	20k
IV	Palos Verdes Estates	14k
IV	Piru	1k
IV	Westlake Village	8k
IV	East Hemet	13k
IV	Highland	51k
IV	Oak Park	2k
IV	Coto De Caza	18k
IV	Muscoy	9k
IV	Romoland	3k
IV	Culver City	40k
IV	Simi Valley	119k
IV	Gardena	60k
IV	Inglewood	116k
IV	Redlands	70k
IV	Santa Monica	88k
IV	Lake Los Angeles	13k
IV	Torrance	144k
IV	Rancho Palos Verdes	42k
IV	Rolling Hills Estates	8k
IV	Ladera Heights	6k
IV	Lomita	20k
IV	Redondo Beach	67k
IV	Homeland	3k
IV	Valle Vista	11k
IV	Lennox	23k
IV	Alondra Park	8k
IV	Winchester	2k
IV	Apple Valley	64k
IV	Murrieta	88k
IV	Marina del Rey	8k
IV	Hermosa Beach	19k
IV	Hawthorne	87k
IV	Hesperia	73k
IV	Rolling Hills	1k
IV	Lawndale	32k
IV	Thousand Oaks	127k
IV	Las Flores	6k
IV	Palmdale	135k
IV	Manhattan Beach	37k
IV	Adelanto	18k
IV	Del Aire	9k
IV	Camarillo	62k
IV	Moorpark	37k
IV	Val Verde	1k
IV	Crestline	11k
IV	Malibu	12k
IV	El Segundo	16k
IV	Murrieta Hot Springs	3k
IV	Malibu Beach	13k
IV	Mountain View Acres	2k
IV	Desert View Highlands	2k
IV	Casa Conejo	3k
IV	Calimesa	7k
IV	Vincent	15k
IV	Victorville	83k
IV	Lancaster	129k
IV	Carpinteria	13k
IV	Beaumont	18k
IV	Temecula	85k
IV	Mentone	9k
IV	Yucaipa	50k
IV	Oxnard	170k
IV	El Rio	6k
IV	Cherry Valley	5k
IV	Banning	30k
IV	Palm Springs	42k
IV	Indian Wells	3k
IV	Port Hueneme	21k
IV	Acton	3k
IV	Avalon	3k
IV	Oxnard Shores	187k
IV	Boron	2k
IV	Ventura	96k
IV	Palm Desert	48k
IV	Fallbrook	33k
IV	Rancho Mirage	16k
IV	Channel Islands Beach	3k
IV	Quartz Hill	10k
IV	Lake Arrowhead	10k
IV	Bonsall	4k
IV	Bermuda Dunes	7k
IV	Rainbow	2k
IV	Oceanside	161k
IV	La Quinta	37k
IV	Encinitas	58k
IV	Cabazon	2k
IV	National City	62k
IV	Toro Canyon	1k
IV	Fillmore	15k
IV	Cathedral City	52k
IV	Valley Center	10k
IV	Big Bear Lake	6k
IV	Oak View	4k
IV	Solana Beach	12k
IV	Carlsbad	78k
IV	Rosamond	18k
IV	Santa Paula	29k
IV	Running Springs	5k
IV	Park Encinitas Trailer Park	61k
IV	Chula Vista	213k
IV	Big Bear City	6k
IV	Vista	92k
IV	Rancho Carlsbad Trailer Park	91k
IV	San Marcos	69k
IV	Del Mar	4k
IV	North Edwards	1k
IV	Ojai	8k
IV	Summerland	1k
IV	Thousand Palms	5k
IV	Lake San Marcos	4k
IV	Lenwood	3k
IV	Indio	65k
IV	Mira Monte	7k
IV	Rancho Santa Fe	3k
IV	San Diego	1223k
IV	Desert Hot Springs	18k
IV	Escondido	137k
IV	Meiners Oaks	4k
IV	Poway	48k
IV	Coronado	24k
IV	Bonita	12k
IV	Hidden Meadows	4k
IV	Mojave	3k
IV	Montecito	10k
IV	Barstow Heights	24k
IV	Jamul	8k
IV	Morongo Valley	2k
IV	California City	8k
IV	Rancho San Diego	28k
IV	Granite Hills	3k
IV	Bostonia	16k
IV	Barstow	21k
IV	Imperial Beach	27k
IV	Lakeside	19k
IV	Coachella	30k
IV	La Presa	35k
IV	Santee	52k
IV	Winter Gardens	21k
IV	Crest	2k
IV	El Cajon	94k
IV	Harbison Canyon	4k
IV	Yucca Valley	19k
IV	Alpine	15k
IV	Borrego Springs	2k
IV	Ramona	17k
IV	Joshua Tree	4k
IV	Lemon Grove	24k
IV	Spring Valley	26k
IV	Pine Mountain Club	1k
IV	La Mesa	54k
IV	Lebec	1k
IV	San Diego Country Estates	10k
IV	Tehachapi	12k
IV	Golden Hills	8k
IV	Mecca	7k
IV	Julian	1k
IV	Frazier Park	2k
IV	Arvin	14k
IV	Stallion Springs	1k
IV	Salton City	1k
IV	Twentynine Palms	22k
IV	Bear Valley Springs	5k
IV	Tijuana	1376k
IV	Lamont	14k
IV	Pine Valley	1k
III	Rosedale	11k
III	Buttonwillow	1k
III	Tecate	58k
III	Shafter	14k
III	Maricopa	1k
III	Taft Heights	1k
III	Ford City	3k
III	South Taft	1k
III	Taft	9k
III	Oildale	28k
III	Bakersfield	291k

Table of MMI estimates and populations for settlements falling within the map boundaries. The settlement name, location, and population are obtained from the freely-available GeoNames geographical database.

Downloads

Details

Magnitude	5.4
Max MMI	VI
Date-Time	Tuesday, July 29, 2008 at 18:42:15 UTC
Location	33.953°N, 117.761°W
Depth	14.7 km (9.1 miles)
Event ID	CI14383980
Version	4

Additional Information