PAGER - M 3.5 - 14.1 km (8.8 mi) N of Morgan Hill, 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?Thursday, April 30th, 2009 at 22:50:54 UTC (15:50:54 local)Location: 37.3° N, 121.6° WDepth: 6kmEvent Id: NC51220793Alert Version: 1Created: 73 weeks, 0 days 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)
 
100
1 to 9 (YELLOW)0
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)
 
90
1 to 10 million (YELLOW)
 
9
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 Exposure7,802k*317k*460000000
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
1984-11-262555.1V (17k)0
1989-10-18206.9IX (3k)62
2003-12-221886.6VII (213)2

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
IIMorgan Hill35k
IISan Martin6k
IISeven Trees2k
IDay Valley4k
IAlum Rock14k
ICorralitos2k
ISan Jose895k
ISan Francisco732k
IOakland399k
IStockton290k
IModesto216k

(k = x1,000)

Historical Events Map
Nearby Events in the EXPO-CAT Earthquake Catalog
#Date/TimeMagLat, Lon, DepthCountryMax MMI (Exposed)DeathsSecondary Effects
ShakingTotal
11975-08-01
20:20 UTC
5.839.5° N, 121.4° W
6km
USVIII (3 k)00
21978-08-13
22:54 UTC
5.834.39° N, 119.64° W
8km
USVIII (40 k)00
31978-10-04
16:42 UTC
5.437.39° N, 118.69° W
8km
USVI (598)00
41979-08-06
17:05 UTC
5.737.07° N, 121.6° W
8km
USVIII (152)00
51980-01-24
19:00 UTC
5.837.71° N, 121.73° W
15km
USVII (31 k)11
61980-01-27
02:33 UTC
5.837.74° N, 121.74° W
15km
USVI (371 k)00
71980-05-25
16:33 UTC
6.237.53° N, 118.83° W
11km
USIX (72)00landslide
81980-05-25
16:49 UTC
5.937.55° N, 119.02° W
3km
USVIII (16)00
91980-05-25
19:44 UTC
5.937.38° N, 118.84° W
4km
USVII (2)00landslide
101980-05-25
20:35 UTC
5.937.44° N, 118.96° W
2km
USVI (6 k)00
111980-05-25
20:59 UTC
5.537.59° N, 118.83° W
10km
USVII (660)00
121980-05-26
12:24 UTC
5.637.58° N, 118.9° W
2km
USVII (2 k)00
131980-05-26
18:57 UTC
5.737.56° N, 118.9° W
6km
USVII (2 k)00
141980-05-27
14:50 UTC
5.937.42° N, 118.8° W
1km
USVIII (3)00
151981-09-30
11:53 UTC
5.637.55° N, 118.8° W
15km
USVII (591)00
161983-05-02
23:42 UTC
6.336.22° N, 120.3° W
10km
USIX (29)00
171983-05-02
23:46 UTC
5.736.23° N, 120.29° W
8km
USVIII (1 k)00
181983-07-09
07:40 UTC
5.136.17° N, 120.37° W
1km
USVII (10 k)00
191983-07-22
02:39 UTC
5.736.2° N, 120.34° W
7km
USVII (1 k)00
201984-04-24
21:15 UTC
6.237.31° N, 121.71° W
9km
USIX (1)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
251986-01-26
19:20 UTC
5.436.75° N, 121.36° W
6km
USVII (2 k)00
261986-03-31
11:55 UTC
5.637.53° N, 121.59° W
6km
USVII (117)00
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
301986-07-21
22:07 UTC
5.437.64° N, 118.49° W
6km
USVII (15)00
311986-07-31
07:22 UTC
5.537.46° N, 118.4° W
15km
USVII (210)00
321988-06-27
18:43 UTC
5.737.13° N, 121.88° W
13km
USVIII (6)00
331989-08-08
08:13 UTC
5.437.13° N, 121.93° W
15km
USVII (4 k)11
341989-10-18
00:04 UTC
6.937.11° N, 121.77° W
11km
USIX (3 k)6263landslide, tsunami
351991-08-17
19:29 UTC
6.140.25° N, 124.11° W
16km
USVIII (255)00
361992-03-08
03:43 UTC
5.440.26° N, 123.97° W
14km
USVII (53)00
371993-05-17
23:20 UTC
6.137.15° N, 117.82° W
10km
USVIII (6)00
381994-09-12
12:23 UTC
5.938.86° N, 119.71° W
5km
USVIII (14 k)00
391995-09-20
23:27 UTC
5.535.63° N, 117.73° W
15km
USVIII (852)00
401995-12-28
18:27 UTC
5.538.78° N, 119.55° W
5km
USVII (2 k)00
411998-08-12
14:10 UTC
5.236.68° N, 121.53° W
9km
USVII (1 k)00
421999-05-15
13:22 UTC
5.537.45° N, 118.8° W
1km
USVII (4)00
432000-09-03
08:36 UTC
538.38° N, 122.41° W
10km
USVI (77 k)00
442003-12-22
19:15 UTC
6.635.62° N, 121.07° W
16km
USVII (213)22landslide, liquefaction
452004-09-28
17:15 UTC
635.75° N, 120.32° W
5km
USVII (160)00
MMICityPopulation
IIMorgan Hill35k
IISan Martin6k
IISeven Trees2k
IDay Valley4k
IAlum Rock14k
ICorralitos2k
IGilroy45k
IAmesti3k
ISanta Venetia5k
IVine Hill3k
IAlameda70k
IAlamo18k
IAlbany16k
IAngels Camp3k
IAntioch106k
IAptos10k
IAromas3k
IAshland23k
IAtherton7k
IAtwater30k
IAugust9k
IBay Point22k
IBelmont24k
IBelvedere2k
IBen Lomond3k
IBenicia27k
IBerkeley100k
IBethel Island2k
IBolinas1k
IBoronda1k
IBoulder Creek4k
IBrentwood47k
IBrisbane3k
IBroadmoor4k
IBuena Vista2k
IBurbank5k
IBurlingame27k
IBystrom5k
ICambrian Park3k
ICampbell37k
ICapitola10k
ICarmel Valley Village5k
ICarmel-by-the-Sea4k
ICastro Valley63k
ICastroville8k
ICeres40k
ICherryland16k
IChualar2k
IClayton11k
IColma1k
IColumbia3k
IConcord126k
ICopperopolis3k
ICorte Madera9k
ICountry Club10k
ICrockett3k
ICupertino51k
IDaly City99k
IDanville43k
IDel Monte Forest4k
IDel Rey Oaks2k
IDel Rio1k
IDelhi12k
IDenair3k
IDiablo1k
IDiscovery Bay12k
IDos Palos5k
IDublin39k
IEast Foothills8k
IEast Oakdale3k
IEast Palo Alto33k
IEast Richmond Heights3k
IEl Cerrito23k
IEl Granada7k
IEl Sobrante14k
IElkhorn2k
IEmerald Lake Hills4k
IEmeryville8k
IEmpire4k
IEscalon7k
IFairfax7k
IFairview10k
IFelton1k
IFirebaugh7k
IFoster City29k
IFreedom6k
IFremont203k
IFrench Camp5k
IGarden Acres11k
IGonzales9k
IGrayson1k
IGustine6k
IHalf Moon Bay12k
IHayward140k
IHercules24k
IHillsborough10k
IHollister37k
IHughson7k
IInterlaken8k
IJamestown4k
IKennedy4k
IKensington5k
IKentfield7k
IKeyes6k
ILafayette25k
ILarkspur12k
ILas Lomas3k
ILathrop13k
ILexington Hills3k
ILincoln Village4k
ILinden1k
ILive Oak18k
ILivingston12k
ILivermore80k
ILos Altos27k
ILos Altos Hills8k
ILos Banos33k
ILos Gatos28k
ILoyola4k
IManteca66k
IMarina17k
IMartinez37k
IMenlo Park29k
IMerced73k
IMill Valley13k
IMillbrae20k
IMilpitas63k
IModesto216k
IMontara3k
IMonte Sereno3k
IMonterey30k
IMorada4k
IMoraga17k
IMoss Beach2k
IMountain View2k
IMountain View68k
INewark43k
INewman8k
INorth Fair Oaks16k
IOakdale19k
IOakland399k
IOakley27k
IOpal Cliffs7k
IOrinda18k
IPacheco4k
IPacifica36k
IPacific Grove15k
IPajaro3k
IPalo Alto57k
IPatterson16k
IPiedmont11k
IPinole20k
IPittsburg63k
IPleasant Hill34k
IPleasanton67k
IPortola Valley4k
IPrunedale23k
IRedwood City72k
IRichmond103k
IRidgemark3k
IRio Del Mar9k
IRipon14k
IRiverbank19k
IRiverdale Park1k
IRodeo9k
IRollingwood3k
IRoss2k
ISalida17k
ISalinas149k
ISan Anselmo12k
ISan Bruno40k
ISan Carlos27k
ISan Francisco732k
ISan Jose895k
ISan Juan Bautista2k
ISan Leandro80k
ISan Lorenzo23k
ISan Mateo90k
ISan Pablo31k
ISan Rafael55k
ISan Ramon45k
ISanta Clara102k
ISanta Cruz55k
ISaratoga29k
ISausalito7k
IScotts Valley11k
ISeaside36k
IShackelford6k
ISoledad28k
ISoquel5k
ISouth Dos Palos2k
ISouth San Francisco59k
IStanford13k
IStockton290k
IStrawberry5k
ISunnyvale127k
ISunol1k
ITara Hills6k
ITiburon9k
ITracy83k
ITurlock68k
ITwin Lakes6k
IUnion City67k
IUnion City70k
IWaldon6k
IWalnut Creek65k
IWaterford9k
IWatsonville46k
IWest Menlo Park4k
IWinton10k
IWoodacre1k
IWoodside5k

(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.