M 3.8 - 2.7 mi SSE of Diamond Bar, CA
Tuesday, July 29, 2008 at 18:51:46 UTCLocation: 34.0°N 117.8°W Depth: 18km
Alert version 1
Summary
Estimated Population Exposed to Earthquake Shaking
Est. Modified Mercalli Intensity | Est. Population Exposure (k = x1000) | Perceived Shaking | Potential Structure Damage | |
---|---|---|---|---|
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 | 0 | Strong | Light | Moderate |
V | 0 | Moderate | V. Light | Light |
IV | 10k | Light | None | None |
II-III | 9,199k | Weak | None | None |
I | 7,771k* | Not Felt | None | None |
MMI | City | Population |
---|---|---|
IV | La Puente | 42k |
III | Rowland Heights | 52k |
III | Hacienda Heights | 54k |
III | La Habra Heights | 6k |
III | Valinda | 23k |
III | La Habra | 59k |
III | South San Jose Hills | 21k |
III | Santa Ana | 343k |
III | Anaheim | 328k |
II | Los Angeles | 3694k |
II | Long Beach | 482k |
Population exposure estimates are NOT a direct estimate of earthquake damage; comparable shaking will result in significantly lower losses in regions with well built structures than in regions with vulnerable structures. Overall, the population in this region resides in structures that are resistant to earthquake shaking, though some vulnerable structures exist.
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
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/ci/shake/14384012.
Exposure
Est. Modified Mercalli Intensity | Est. Population Exposure (k = x1000) | Perceived Shaking | Potential Structure Damage | |
---|---|---|---|---|
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 | 0 | Strong | Light | Moderate |
V | 0 | Moderate | V. Light | Light |
IV | 10k | Light | None | None |
II-III | 9,199k | Weak | None | None |
I | 7,771k* | Not Felt | None | None |
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 |
---|---|---|
IV | La Puente | 42k |
III | Rowland Heights | 52k |
III | Hacienda Heights | 54k |
III | La Habra Heights | 6k |
III | Valinda | 23k |
III | La Habra | 59k |
III | South San Jose Hills | 21k |
III | West Puente Valley | 24k |
III | Avocado Heights | 15k |
III | Orange | 128k |
III | Brea | 39k |
III | Walnut | 31k |
III | West Covina | 109k |
III | East La Mirada | 9k |
III | Villa Park | 6k |
III | Placentia | 49k |
III | Whittier | 85k |
III | South El Monte | 22k |
III | Yorba Linda | 64k |
III | El Monte | 125k |
III | Artesia | 16k |
III | Covina | 48k |
III | Buena Park | 79k |
III | South San Gabriel | 7k |
III | Tustin | 68k |
III | Cerritos | 53k |
III | Diamond Bar | 58k |
III | Stanton | 37k |
III | La Palma | 16k |
III | Hawaiian Gardens | 15k |
III | South Whittier | 58k |
III | La Mirada | 49k |
III | Pico Rivera | 66k |
III | Santa Ana | 343k |
III | Baldwin Park | 80k |
III | Rosemead | 56k |
III | Montebello | 64k |
III | Cypress | 47k |
III | North Tustin | 24k |
III | East Los Angeles | 125k |
III | Belvedere | 2k |
III | Los Serranos | 7k |
III | Citrus | 11k |
III | Norwalk | 109k |
III | Anaheim | 328k |
III | Santa Fe Springs | 16k |
III | Pomona | 156k |
III | Chino | 75k |
III | North El Monte | 3k |
III | Garden Grove | 167k |
III | Chino Hills | 66k |
III | Irwindale | 1k |
III | Monterey Park | 63k |
III | Charter Oak | 9k |
III | Upland | 74k |
III | Bellflower | 75k |
III | Los Alamitos | 11k |
III | Temple City | 37k |
III | Commerce | 13k |
III | Mayflower Village | 5k |
III | Downey | 111k |
III | Azusa | 48k |
III | Bell Gardens | 46k |
II | La Verne | 33k |
II | Montclair | 35k |
II | San Gabriel | 41k |
II | Westminster | 89k |
II | Ontario | 172k |
II | Lakewood | 82k |
II | Alhambra | 88k |
II | Claremont | 35k |
II | Rossmoor | 10k |
II | Glendora | 51k |
II | Maywood | 28k |
II | Arcadia | 56k |
II | San Dimas | 36k |
II | Bell | 38k |
II | Duarte | 22k |
II | Rancho Cucamonga | 168k |
II | San Marino | 13k |
II | Cudahy | 25k |
II | Bradbury | 1k |
II | Monrovia | 38k |
II | Paramount | 57k |
II | South Pasadena | 24k |
II | Fullerton | 135k |
II | San Antonio Heights | 3k |
II | Fountain Valley | 56k |
II | Sierra Madre | 11k |
II | South Gate | 99k |
II | Irvine | 189k |
II | East Compton | 10k |
II | Lynwood | 72k |
II | Pasadena | 144k |
II | Huntington Park | 63k |
II | Walnut Park | 17k |
II | Corona | 152k |
II | Norco | 27k |
II | Signal Hill | 10k |
II | Compton | 96k |
II | Mira Loma | 18k |
II | Seal Beach | 24k |
II | East Pasadena | 6k |
II | Los Angeles | 3694k |
II | Glen Avon | 16k |
II | Foothill Ranch | 11k |
II | Home Gardens | 10k |
II | El Cerrito | 4k |
II | Altadena | 43k |
II | Willowbrook | 35k |
II | Rubidoux | 32k |
II | Lake Forest | 76k |
II | Costa Mesa | 108k |
II | Portola Hills | 9k |
II | Newport Beach | 78k |
II | San Joaquin Hills | 3k |
II | Huntington Beach | 195k |
II | La Canada Flintridge | 21k |
II | Riverside | 297k |
II | Long Beach | 482k |
II | Sunnyslope | 4k |
II | Laguna Woods | 19k |
II | Glendale | 194k |
II | Pedley | 12k |
II | Aliso Viejo | 41k |
II | West Compton | 5k |
II | Rancho Santa Margarita | 51k |
II | North Glendale | 203k |
II | Trabuco Canyon | 3k |
II | Bloomington | 22k |
II | Laguna Hills | 30k |
I | Fontana | 169k |
I | San Fernando | 24k |
I | Mission Viejo | 96k |
I | Highgrove | 3k |
I | Carson | 95k |
I | Westmont | 32k |
I | West Athens | 9k |
I | Grand Terrace | 12k |
I | Rialto | 101k |
I | Gardena | 60k |
I | Laguna Beach | 24k |
I | West Carson | 21k |
I | Las Flores | 5k |
I | Colton | 52k |
I | Loma Linda | 20k |
I | Muscoy | 9k |
I | Moreno Valley | 168k |
I | Woodcrest | 8k |
I | Burbank | 104k |
I | San Bernardino | 202k |
I | Laguna Niguel | 66k |
I | Coto De Caza | 18k |
I | Alondra Park | 8k |
I | Lomita | 20k |
I | West Hollywood | 37k |
I | Hawthorne | 87k |
I | Hidden Hills | 2k |
I | Lennox | 23k |
I | Calabasas | 21k |
I | Torrance | 144k |
I | Perris | 46k |
I | Wrightwood | 4k |
I | Lawndale | 32k |
I | Dana Point | 35k |
I | Rolling Hills Estates | 8k |
I | Lakeland Village | 5k |
I | Highland | 51k |
I | Cherry Valley | 5k |
I | Las Flores | 6k |
I | Big Bear Lake | 6k |
I | Bonsall | 4k |
I | Piru | 1k |
I | Nuevo | 4k |
I | Running Springs | 5k |
I | Marina del Rey | 8k |
I | Littlerock | 1k |
I | Valley Center | 10k |
I | Mentone | 9k |
I | Westlake Village | 8k |
I | Calimesa | 7k |
I | Ladera Heights | 6k |
I | Quartz Hill | 10k |
I | Big Bear City | 6k |
I | Lakeview | 1k |
I | Crestline | 11k |
I | Winchester | 2k |
I | Desert View Highlands | 2k |
I | Mountain View Acres | 2k |
I | Lake Arrowhead | 10k |
I | Oak Park | 2k |
I | Westwood | 2k |
I | Rainbow | 2k |
I | Morongo Valley | 2k |
I | Cabazon | 2k |
I | Romoland | 3k |
I | Quail Valley | 1k |
I | Murrieta Hot Springs | 3k |
I | Homeland | 3k |
I | Avalon | 3k |
I | Val Verde | 1k |
I | Acton | 3k |
I | Sedco Hills | 3k |
I | Casa Conejo | 3k |
I | Hidden Meadows | 4k |
I | Hermosa Beach | 19k |
I | Culver City | 40k |
I | Palm Springs | 42k |
I | San Clemente | 62k |
I | Apple Valley | 64k |
I | Beverly Hills | 35k |
I | Palmdale | 135k |
I | Yucaipa | 50k |
I | Redondo Beach | 67k |
I | Canyon Lake | 11k |
I | Hemet | 69k |
I | San Marcos | 69k |
I | Rancho Carlsbad Trailer Park | 91k |
I | Vista | 92k |
I | Lancaster | 129k |
I | Thousand Oaks | 127k |
I | Santa Monica | 88k |
I | Temecula | 85k |
I | Hesperia | 73k |
I | Carlsbad | 78k |
I | Victorville | 83k |
I | Rancho Palos Verdes | 42k |
I | Manhattan Beach | 37k |
I | Palos Verdes Estates | 14k |
I | Vincent | 15k |
I | Fillmore | 15k |
I | Wildomar | 16k |
I | Lake Los Angeles | 13k |
I | East Hemet | 13k |
I | Valle Vista | 11k |
I | Malibu | 12k |
I | Malibu Beach | 13k |
I | El Segundo | 16k |
I | Adelanto | 18k |
I | Santa Clarita | 168k |
I | Banning | 30k |
I | Fallbrook | 33k |
I | Moorpark | 37k |
I | Agoura Hills | 22k |
I | Agoura | 20k |
I | Beaumont | 18k |
I | Sun City | 19k |
I | Oceanside | 161k |
I | Simi Valley | 119k |
I | Rolling Hills | 1k |
I | San Jacinto | 29k |
I | Murrieta | 88k |
I | Del Aire | 9k |
I | Lake Elsinore | 40k |
I | Redlands | 70k |
I | San Juan Capistrano | 35k |
I | Inglewood | 116k |
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.