PAGER - M 4.1 - 79.8 km (49.6 mi) SSW of Ocotillo, 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, August 9th, 2011 at 23:30:39 UTC (16:30:39 local)Location: 32.1° N, 116.4° WDepth: 11kmEvent Id: CI10990213Alert 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)
 
99
1 to 9 (YELLOW)1
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)
 
99
1 to 10 million (YELLOW)1
10 to 100 million (YELLOW)0
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 Exposure2,928k*2,181k9k57600000
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 a mix of vulnerable and earthquake resistant construction.

Historical Earthquakes (with MMI)

Date (UTC)Dist (km)MagMax MMI (#)Shaking Deaths
1980-06-091396.3IX (336)1
2001-12-081385.7VIII (72)0
2002-02-221165.5VIII (8k)0

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
IIIEnsenada257k
IIIEl Sauzal9k
IIIManeadero18k
IIPrimo Tapia5k
IITecate58k
IIBostonia16k
IITijuana1,376k
IIEl Cajon95k
IChula Vista213k
ISan Diego1,223k
IMexicali597k

(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
41979-03-15
21:07 UTC
5.534.2° N, 116.53° W
15km
USVII (744)00
51979-10-15
23:17 UTC
6.532.82° N, 115.64° W
9km
USIX (3 k)00
61979-10-16
05:49 UTC
5.633.02° N, 115.57° W
5km
USVIII (611)00
71979-10-16
06:19 UTC
5.132.73° N, 115.76° W
10km
USVII (77)00
81979-10-16
06:58 UTC
5.632.95° N, 115.62° W
10km
USVIII (287)00
91979-10-16
23:16 UTC
5.532.92° N, 115.55° W
4km
USVIII (40)00
101980-02-25
10:47 UTC
5.633.52° N, 116.55° W
6km
USVII (847)00
111980-06-09
03:28 UTC
6.332.27° N, 114.91° W
5km
MXIX (336)11
121981-04-26
12:09 UTC
5.933.12° N, 115.64° W
1km
USVIII (11)00
131981-09-04
15:50 UTC
5.833.9° N, 119.03° W
15km
USVI (13 k)00
141986-07-08
09:20 UTC
633.97° N, 116.78° W
12km
USVIII (8 k)00landslide
151986-07-13
13:47 UTC
5.833.05° N, 117.85° W
2km
USV (9,528 k)01landslide
161987-10-01
14:42 UTC
5.934.06° N, 118.13° W
14km
USVIII (20 k)88
171987-10-04
10:59 UTC
5.234.02° N, 118.14° W
11km
USVII (453 k)01
181987-11-24
01:54 UTC
633.22° N, 115.79° W
15km
USVIII (250)02
191987-11-24
13:15 UTC
6.533.07° N, 115.95° W
2km
USIX (599)00
201988-02-11
15:25 UTC
4.834.08° N, 118.05° W
12km
USVII (11 k)01
211988-12-03
11:38 UTC
534.15° N, 118.13° W
13km
USVI (1,090 k)00
221989-01-19
06:53 UTC
5.233.91° N, 118.7° W
9km
USVI (14 k)00
231990-02-28
23:43 UTC
5.734.14° N, 117.75° W
3km
USVIII (12 k)00
241991-06-28
14:43 UTC
5.634.24° N, 118.01° W
11km
USVII (8 k)11
251992-04-23
04:50 UTC
6.233.87° N, 116.52° W
4km
USVIII (16 k)00
261992-06-28
11:57 UTC
7.334.18° N, 116.53° W
11km
USIX (2 k)11
271992-06-28
15:05 UTC
6.534.29° N, 116.82° W
12km
USIX (2 k)00landslide
281992-06-29
16:01 UTC
5.533.82° N, 116.44° W
15km
USVIII (8 k)00
291992-07-11
18:14 UTC
5.734.96° N, 118.19° W
15km
USVIII (568)00
301992-11-27
16:00 UTC
5.634.23° N, 117.01° W
5km
USVII (4 k)00
311994-01-17
12:30 UTC
6.734.16° N, 118.58° W
11km
USIX (181 k)3333landslide, liquefaction
321994-01-17
23:33 UTC
5.834.27° N, 118.79° W
8km
USVIII (70 k)00
331994-01-18
00:43 UTC
5.534.26° N, 118.89° W
17km
USVII (97 k)00
341999-10-16
09:46 UTC
7.134.52° N, 116.44° W
5km
USIX (17 k)00
351999-10-16
09:59 UTC
5.834.56° N, 116.79° W
9km
USVIII (19)00
361999-10-16
12:57 UTC
5.734.27° N, 116.23° W
12km
USVIII (201)00
372001-12-08
23:36 UTC
5.732.05° N, 114.9° W
9km
MXVIII (72)00
382002-02-22
19:32 UTC
5.532.38° N, 115.19° W
9km
MXVIII (8 k)00
392005-06-16
20:53 UTC
4.933.95° N, 117.05° W
18km
USVI (63 k)00
MMICityPopulation
IIIEnsenada257k
IIIEl Sauzal9k
IIIManeadero18k
IIPrimo Tapia5k
IITecate58k
IIBostonia16k
IITijuana1,376k
IILakeside19k
IIRosarito66k
IILa Presa35k
IIEl Cajon95k
IIJamul8k
IICrest3k
IIGranite Hills3k
IIRancho San Diego28k
IIAlpine15k
IIHarbison Canyon5k
IIBonita13k
IIProgreso5k
IWinter Gardens21k
IPine Valley2k
ILa Mesa54k
ISpring Valley26k
IChula Vista213k
ISantee53k
ILemon Grove25k
IImperial Beach27k
INational City62k
ISeeley2k
IPoway48k
IRamona17k
IHeber3k
ICoronado24k
IHoltville5k
ISan Diego1,223k
ISan Diego Country Estates11k
IMexicali597k
ICalexico36k
IEl Centro38k
IImperial10k
IAlberto Oviedo Mota8k
IDelta6k
IPuebla9k
IBrawley22k
IDel Mar4k
IEncinitas58k
IRancho Santa Fe3k
ISolana Beach13k
IWestmorland2k

(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.