PAGER - M 3.5 - 8.4 km (5.2 mi) SE of Ontario, CA

Alert level does not include impacts from earthquake-related hazards such as tsunamis, landslides, fires or liquefaction.

Earthquake Shaking Alert Level: GREEN

Download Alert PDFWhat's this?Tuesday, December 20th, 2011 at 08:32:23 UTC (00:32:23 local)Location: 34° N, 117.6° WDepth: 4kmEvent Id: CI15088052Alert Version: 4Created: 1 day, 0 hours after earthquake.
Global Location

Alert Information

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Estimated FatalitiesFatality Alert Level: GREEN
ESTIMATED FATALITY ALERT: GREEN
ESTIMATED FATALITIES (LEVEL)Probability (%)
0 (GREEN)
 
81
1 to 9 (YELLOW)
 
19
10 to 99 (YELLOW)0
100 to 999 (ORANGE)0
1 to 10 thousand (RED)0
10 to 100 thousand (RED)0
100 thousand + (RED)0
Estimated Economic LossesEconomic Alert Level: GREEN
ESTIMATED ECONOMIC ALERT: GREEN
ESTIMATED VALUE IN USD (LEVEL)Probability (%)
0 to 1 million (GREEN)
 
65
1 to 10 million (YELLOW)
 
30
10 to 100 million (YELLOW)
 
4
100 million to 1 billion (ORANGE)0
1 to 10 billion (RED)0
10 to 100 billion (RED)0
100 billion + (RED)0

Detailed Information

Estimated Population Exposed to Earthquake Shaking
Estimated Modified Mercalli IntensityIII-IIIIVVVIVIIVIIIIXX
Est. Population Exposure14,814k2,729k321k39k00000
Perceived ShakingNot FeltWeakLightModerateStrongVery StrongSevereViolentExtreme
Potential Structure DamageResistantnonenonenoneV. LightLightModerateModerate/HeavyHeavyV. Heavy
VulnerablenonenonenoneLightModerateModerate/HeavyHeavyV. HeavyV. Heavy
*Estimated exposure only includes population within calculated shake map area
Population Exposure
Population per ~1 sq. km. from LandScan
Population Exposure Map

Structure Information Summary

Overall, the population in this region resides in structures that are highly resistant to earthquake shaking, though some vulnerable structures exist.

Historical Earthquakes (with MMI)

Date (UTC)Dist (km)MagMax MMI (#)Shaking Deaths
1984-11-263805.1V (17k)0
2003-12-223656.6VII (213)2
1994-01-17926.7IX (181k)33

Recent earthquakes in this area have caused secondary hazards such as landslides and liquefaction that might have contributed to losses.

Selected Cities Exposedfrom GeoNames Database of Cities with 1,000 or more residents.
MMICityPopulation
IVMira Loma19k
IVNorco27k
IVGlen Avon16k
IVOntario173k
IIIChino75k
IIIPedley13k
IIRiverside298k
IAnaheim328k
ILos Angeles3,695k
ILong Beach483k
ISanta Ana343k

(k = x1,000)

Historical Events Map
Nearby Events in the EXPO-CAT Earthquake Catalog
#Date/TimeMagLat, Lon, DepthCountryMax MMI (Exposed)DeathsSecondary Effects
ShakingTotal
11973-02-21
14:45 UTC
5.934.06° N, 119.05° W
6km
USVIII (4 k)00
21978-05-05
21:03 UTC
5.532.22° N, 115.32° W
5km
MXVIII (97)00
31978-08-13
22:54 UTC
5.834.39° N, 119.64° W
8km
USVIII (40 k)00
41978-10-04
16:42 UTC
5.437.39° N, 118.69° W
8km
USVI (598)00
51979-03-15
21:07 UTC
5.534.2° N, 116.53° W
15km
USVII (744)00
61979-10-15
23:17 UTC
6.532.82° N, 115.64° W
9km
USIX (3 k)00
71979-10-16
05:49 UTC
5.633.02° N, 115.57° W
5km
USVIII (611)00
81979-10-16
06:19 UTC
5.132.73° N, 115.76° W
10km
USVII (77)00
91979-10-16
06:58 UTC
5.632.95° N, 115.62° W
10km
USVIII (287)00
101979-10-16
23:16 UTC
5.532.92° N, 115.55° W
4km
USVIII (40)00
111980-02-25
10:47 UTC
5.633.52° N, 116.55° W
6km
USVII (847)00
121980-05-25
19:44 UTC
5.937.38° N, 118.84° W
4km
USVII (2)00landslide
131980-05-27
14:50 UTC
5.937.42° N, 118.8° W
1km
USVIII (3)00
141980-06-09
03:28 UTC
6.332.27° N, 114.91° W
5km
MXIX (336)11
151981-04-26
12:09 UTC
5.933.12° N, 115.64° W
1km
USVIII (11)00
161981-09-04
15:50 UTC
5.833.9° N, 119.03° W
15km
USVI (13 k)00
171983-05-02
23:42 UTC
6.336.22° N, 120.3° W
10km
USIX (29)00
181983-05-02
23:46 UTC
5.736.23° N, 120.29° W
8km
USVIII (1 k)00
191983-07-09
07:40 UTC
5.136.17° N, 120.37° W
1km
USVII (10 k)00
201983-07-22
02:39 UTC
5.736.2° N, 120.34° W
7km
USVII (1 k)00
211984-11-23
18:08 UTC
5.837.34° N, 118.51° W
15km
USVIII (8 k)00
221984-11-23
19:12 UTC
5.537.44° N, 118.64° W
0km
USVII (381)00
231984-11-26
16:21 UTC
5.137.29° N, 118.76° W
10km
USV (17 k)00landslide
241985-08-04
12:01 UTC
6.136.14° N, 120.11° W
15km
USIX (713)00
251986-07-08
09:20 UTC
633.97° N, 116.78° W
12km
USVIII (8 k)00landslide
261986-07-13
13:47 UTC
5.833.05° N, 117.85° W
2km
USV (9,528 k)01landslide
271986-07-20
14:29 UTC
5.837.5° N, 118.45° W
15km
USVIII (9)00
281986-07-21
14:42 UTC
6.237.5° N, 118.44° W
10km
USVIII (375)00
291986-07-21
14:51 UTC
5.737.5° N, 118.37° W
9km
USVIII (270)00
301986-07-31
07:22 UTC
5.537.46° N, 118.4° W
15km
USVII (210)00
311987-10-01
14:42 UTC
5.934.06° N, 118.13° W
14km
USVIII (20 k)88
321987-10-04
10:59 UTC
5.234.02° N, 118.14° W
11km
USVII (453 k)01
331987-11-24
01:54 UTC
633.22° N, 115.79° W
15km
USVIII (250)02
341987-11-24
13:15 UTC
6.533.07° N, 115.95° W
2km
USIX (599)00
351988-02-11
15:25 UTC
4.834.08° N, 118.05° W
12km
USVII (11 k)01
361988-12-03
11:38 UTC
534.15° N, 118.13° W
13km
USVI (1,090 k)00
371989-01-19
06:53 UTC
5.233.91° N, 118.7° W
9km
USVI (14 k)00
381990-02-28
23:43 UTC
5.734.14° N, 117.75° W
3km
USVIII (12 k)00
391991-06-28
14:43 UTC
5.634.24° N, 118.01° W
11km
USVII (8 k)11
401992-04-23
04:50 UTC
6.233.87° N, 116.52° W
4km
USVIII (16 k)00
411992-06-28
11:57 UTC
7.334.18° N, 116.53° W
11km
USIX (2 k)11
421992-06-28
15:05 UTC
6.534.29° N, 116.82° W
12km
USIX (2 k)00landslide
431992-06-29
10:14 UTC
5.736.77° N, 116.32° W
11km
USVIII (127)00
441992-06-29
16:01 UTC
5.533.82° N, 116.44° W
15km
USVIII (8 k)00
451992-07-11
18:14 UTC
5.734.96° N, 118.19° W
15km
USVIII (568)00
461992-11-27
16:00 UTC
5.634.23° N, 117.01° W
5km
USVII (4 k)00
471993-05-17
23:20 UTC
6.137.15° N, 117.82° W
10km
USVIII (6)00
481994-01-17
12:30 UTC
6.734.16° N, 118.58° W
11km
USIX (181 k)3333landslide, liquefaction
491994-01-17
23:33 UTC
5.834.27° N, 118.79° W
8km
USVIII (70 k)00
501994-01-18
00:43 UTC
5.534.26° N, 118.89° W
17km
USVII (97 k)00
511995-09-20
23:27 UTC
5.535.63° N, 117.73° W
15km
USVIII (852)00
521999-05-15
13:22 UTC
5.537.45° N, 118.8° W
1km
USVII (4)00
531999-10-16
09:46 UTC
7.134.52° N, 116.44° W
5km
USIX (17 k)00
541999-10-16
09:59 UTC
5.834.56° N, 116.79° W
9km
USVIII (19)00
551999-10-16
12:57 UTC
5.734.27° N, 116.23° W
12km
USVIII (201)00
562001-12-08
23:36 UTC
5.732.05° N, 114.9° W
9km
MXVIII (72)00
572002-02-22
19:32 UTC
5.532.38° N, 115.19° W
9km
MXVIII (8 k)00
582003-12-22
19:15 UTC
6.635.62° N, 121.07° W
16km
USVII (213)22landslide, liquefaction
592004-09-28
17:15 UTC
635.75° N, 120.32° W
5km
USVII (160)00
602005-06-16
20:53 UTC
4.933.95° N, 117.05° W
18km
USVI (63 k)00
MMICityPopulation
IVMira Loma19k
IVNorco27k
IVGlen Avon16k
IVOntario173k
IIIChino75k
IIIPedley13k
IIISunnyslope5k
IIIRancho Cucamonga169k
IIILos Serranos7k
IIIUpland74k
IIIFontana169k
IIIHome Gardens11k
IIICorona153k
IIIRubidoux32k
IIIMontclair36k
IIIBloomington22k
IIRialto102k
IIEl Cerrito5k
IIHighgrove4k
IIClaremont35k
IIColton52k
IIRiverside298k
IIGrand Terrace13k
IIPomona156k
IISan Bernardino202k
IIMuscoy10k
IIChino Hills67k
IILa Verne34k
IISan Antonio Heights3k
IILoma Linda21k
IIDiamond Bar59k
IIRowland Heights52k
IIHighland51k
IIPlacentia49k
IIRedlands70k
IIYorba Linda65k
IISouth San Jose Hills22k
IIWoodcrest9k
IIBrea40k
IICharter Oak9k
IISan Dimas36k
IIWalnut32k
ILa Habra60k
IValinda24k
IFullerton135k
ILa Habra Heights6k
ICovina49k
IMoreno Valley169k
ILa Puente43k
IVilla Park6k
ICitrus11k
IMentone9k
IHacienda Heights54k
IWest Covina110k
IGlendora52k
ITrabuco Canyon3k
IAnaheim328k
IBaldwin Park81k
IWest Puente Valley24k
IWildomar16k
IIrwindale2k
IMurrieta89k
INorth Tustin24k
IAzusa48k
ICanyon Lake12k
IFoothill Ranch12k
IRancho Santa Margarita51k
ICoto De Caza19k
IOrange129k
IBuena Park79k
ILa Mirada50k
ILas Flores6k
IStanton38k
ISedco Hills3k
IMurrieta Hot Springs4k
ICypress47k
IEast La Mirada10k
IPortola Hills9k
IRunning Springs6k
ISun City20k
IWrightwood4k
IYucaipa50k
IAvocado Heights16k
IFountain Valley56k
IGarden Grove167k
IHawaiian Gardens16k
ILa Palma16k
ILos Alamitos12k
IMission Viejo96k
IQuail Valley2k
IRossmoor11k
IWestminster90k
ICerritos53k
ILake Elsinore41k
ISouth Whittier59k
ITemecula85k
IWhittier86k
IArtesia17k
ICalimesa8k
ICosta Mesa109k
ILake Forest77k
IActon3k
IAdelanto18k
IAgoura21k
IAgoura Hills22k
IAlhambra88k
IAliso Viejo41k
IAlondra Park8k
IAltadena43k
IApple Valley64k
IArcadia57k
IAvalon3k
IBanning30k
IBeaumont19k
IBell38k
IBell Gardens46k
IBellflower76k
IBelvedere2k
IBeverly Hills35k
IBig Bear City6k
IBig Bear Lake6k
IBonsall5k
IBorrego Springs3k
IBradbury1k
IBurbank105k
ICabazon3k
ICalabasas21k
ICarson96k
ICathedral City53k
ICherry Valley6k
ICommerce14k
ICompton97k
ICrestline11k
ICudahy26k
ICulver City40k
IDana Point36k
IDel Aire10k
IDesert Hot Springs19k
IDesert View Highlands2k
IDowney112k
IDuarte23k
IEast Compton10k
IEast Hemet14k
IEast Los Angeles125k
IEast Pasadena6k
IEast San Gabriel16k
IEl Monte125k
IEl Segundo17k
IFallbrook34k
IGardena61k
IGlendale195k
IHawthorne87k
IHemet69k
IHermosa Beach20k
IHesperia74k
IHidden Hills2k
IHidden Meadows4k
IHollywood168k
IHomeland4k
IHuntington Beach196k
IHuntington Park64k
IInglewood116k
IIrvine189k
ILa Canada Flintridge21k
ILadera Heights7k
ILaguna Beach24k
ILaguna Hills31k
ILaguna Niguel66k
ILaguna Woods20k
ILake Arrowhead11k
ILake Los Angeles14k
ILakeland Village6k
ILakeview2k
ILakewood82k
ILancaster130k
ILas Flores6k
ILawndale33k
ILennox23k
ILittlerock1k
ILomita21k
ILong Beach483k
ILos Angeles3,695k
ILynwood72k
IMalibu13k
IMalibu Beach14k
IManhattan Beach37k
IMarina del Rey9k
IMayflower Village5k
IMaywood29k
IMonrovia38k
IMontebello64k
IMonterey Park63k
IMorongo Valley2k
IMountain View Acres3k
INewport Beach79k
INorth El Monte4k
INorth Glendale203k
INorwalk109k
INuevo5k
IOak Park2k
IOceanside161k
IPalm Desert49k
IPalm Springs43k
IPalmdale135k
IPalos Verdes Estates14k
IParamount57k
IPasadena145k
IPerris46k
IPico Rivera66k
IPiru1k
IQuartz Hill10k
IRainbow2k
IRancho Mirage17k
IRancho Palos Verdes43k
IRedondo Beach68k
IRolling Hills2k
IRolling Hills Estates8k
IRomoland3k
IRosemead56k
ISan Clemente62k
ISan Fernando25k
ISan Gabriel42k
ISan Jacinto29k
ISan Joaquin Hills3k
ISan Juan Capistrano35k
ISan Marino13k
ISanta Ana343k
ISanta Clarita169k
ISanta Fe Springs16k
ISanta Monica88k
ISeal Beach24k
ISierra Madre11k
ISignal Hill11k
ISimi Valley119k
ISouth El Monte22k
ISouth Gate100k
ISouth Pasadena25k
ISouth San Gabriel8k
ITemple City38k
IThousand Oaks128k
IThousand Palms6k
ITorrance145k
ITustin69k
IVal Verde1k
IValle Vista12k
IValley Center10k
IVictorville84k
IVincent15k
IVista93k
IWalnut Park17k
IWest Athens9k
IWest Carson22k
IWest Compton6k
IWest Hollywood37k
IWestlake Village9k
IWestmont32k
IWestwood2k
IWillowbrook35k
IWinchester2k
IYucca Valley19k

(k = x1,000)


PAGER content is automatically generated, and only considers losses due to structural damage. Limitations of input data, shaking estimates, and loss models may add uncertainty. PAGER results are generally available 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 estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.