PAGER - M 4.3 - 17.7 km (11.0 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?Monday, March 30th, 2009 at 17:40:29 UTC (10:40:29 local)Location: 37.3° N, 121.6° WDepth: 7kmEvent Id: NC40234037Alert Version: 1Created: 77 weeks, 4 days after earthquake.
Alert Information
Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.
Estimated Fatalities
| 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 Losses
| 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 Modified Mercalli Intensity | I | II-III | IV | V | VI | VII | VIII | IX | X | |
|---|---|---|---|---|---|---|---|---|---|---|
| Est. Population Exposure | 1,719k* | 6,252k | 233k | 593 | 0 | 0 | 0 | 0 | 0 | |
| Perceived Shaking | Not Felt | Weak | Light | Moderate | Strong | Very Strong | Severe | Violent | Extreme | |
| Potential Structure Damage | Resistant | none | none | none | V. Light | Light | Moderate | Moderate/Heavy | Heavy | V. Heavy |
| Vulnerable | none | none | none | Light | Moderate | Moderate/Heavy | Heavy | V. Heavy | V. Heavy | |
*Estimated exposure only includes population within calculated shake map area
Population Exposure
Population per ~1 sq. km. from LandScan
Population per ~1 sq. km. from LandScan
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) | Mag | Max MMI (#) | Shaking Deaths |
|---|---|---|---|---|
| 1984-11-26 | 253 | 5.1 | V (17k) | 0 |
| 1989-10-18 | 24 | 6.9 | IX (3k) | 62 |
| 2003-12-22 | 191 | 6.6 | VII (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.
| MMI | City | Population |
|---|---|---|
| IV | Morgan Hill | 35k |
| IV | Seven Trees | 2k |
| III | San Martin | 6k |
| III | Gilroy | 45k |
| III | San Jose | 895k |
| III | Burbank | 5k |
| II | Fremont | 203k |
| II | San Francisco | 732k |
| II | Oakland | 399k |
| II | Modesto | 216k |
| I | Stockton | 290k |
(k = x1,000)
| # | Date/Time | Mag | Lat, Lon, Depth | Country | Max MMI (Exposed) | Deaths | Secondary Effects | |
|---|---|---|---|---|---|---|---|---|
| Shaking | Total | |||||||
| 1 | 1975-08-01 20:20 UTC | 5.8 | 39.5° N, 121.4° W 6km | US | VIII (3 k) | 0 | 0 | |
| 2 | 1978-08-13 22:54 UTC | 5.8 | 34.39° N, 119.64° W 8km | US | VIII (40 k) | 0 | 0 | |
| 3 | 1978-10-04 16:42 UTC | 5.4 | 37.39° N, 118.69° W 8km | US | VI (598) | 0 | 0 | |
| 4 | 1979-08-06 17:05 UTC | 5.7 | 37.07° N, 121.6° W 8km | US | VIII (152) | 0 | 0 | |
| 5 | 1980-01-24 19:00 UTC | 5.8 | 37.71° N, 121.73° W 15km | US | VII (31 k) | 1 | 1 | |
| 6 | 1980-01-27 02:33 UTC | 5.8 | 37.74° N, 121.74° W 15km | US | VI (371 k) | 0 | 0 | |
| 7 | 1980-05-25 16:33 UTC | 6.2 | 37.53° N, 118.83° W 11km | US | IX (72) | 0 | 0 | landslide |
| 8 | 1980-05-25 16:49 UTC | 5.9 | 37.55° N, 119.02° W 3km | US | VIII (16) | 0 | 0 | |
| 9 | 1980-05-25 19:44 UTC | 5.9 | 37.38° N, 118.84° W 4km | US | VII (2) | 0 | 0 | landslide |
| 10 | 1980-05-25 20:35 UTC | 5.9 | 37.44° N, 118.96° W 2km | US | VI (6 k) | 0 | 0 | |
| 11 | 1980-05-25 20:59 UTC | 5.5 | 37.59° N, 118.83° W 10km | US | VII (660) | 0 | 0 | |
| 12 | 1980-05-26 12:24 UTC | 5.6 | 37.58° N, 118.9° W 2km | US | VII (2 k) | 0 | 0 | |
| 13 | 1980-05-26 18:57 UTC | 5.7 | 37.56° N, 118.9° W 6km | US | VII (2 k) | 0 | 0 | |
| 14 | 1980-05-27 14:50 UTC | 5.9 | 37.42° N, 118.8° W 1km | US | VIII (3) | 0 | 0 | |
| 15 | 1981-09-30 11:53 UTC | 5.6 | 37.55° N, 118.8° W 15km | US | VII (591) | 0 | 0 | |
| 16 | 1983-05-02 23:42 UTC | 6.3 | 36.22° N, 120.3° W 10km | US | IX (29) | 0 | 0 | |
| 17 | 1983-05-02 23:46 UTC | 5.7 | 36.23° N, 120.29° W 8km | US | VIII (1 k) | 0 | 0 | |
| 18 | 1983-07-09 07:40 UTC | 5.1 | 36.17° N, 120.37° W 1km | US | VII (10 k) | 0 | 0 | |
| 19 | 1983-07-22 02:39 UTC | 5.7 | 36.2° N, 120.34° W 7km | US | VII (1 k) | 0 | 0 | |
| 20 | 1984-04-24 21:15 UTC | 6.2 | 37.31° N, 121.71° W 9km | US | IX (1) | 0 | 0 | |
| 21 | 1984-11-23 18:08 UTC | 5.8 | 37.34° N, 118.51° W 15km | US | VIII (8 k) | 0 | 0 | |
| 22 | 1984-11-23 19:12 UTC | 5.5 | 37.44° N, 118.64° W 0km | US | VII (381) | 0 | 0 | |
| 23 | 1984-11-26 16:21 UTC | 5.1 | 37.29° N, 118.76° W 10km | US | V (17 k) | 0 | 0 | landslide |
| 24 | 1985-08-04 12:01 UTC | 6.1 | 36.14° N, 120.11° W 15km | US | IX (713) | 0 | 0 | |
| 25 | 1986-01-26 19:20 UTC | 5.4 | 36.75° N, 121.36° W 6km | US | VII (2 k) | 0 | 0 | |
| 26 | 1986-03-31 11:55 UTC | 5.6 | 37.53° N, 121.59° W 6km | US | VII (117) | 0 | 0 | |
| 27 | 1986-07-20 14:29 UTC | 5.8 | 37.5° N, 118.45° W 15km | US | VIII (9) | 0 | 0 | |
| 28 | 1986-07-21 14:42 UTC | 6.2 | 37.5° N, 118.44° W 10km | US | VIII (375) | 0 | 0 | |
| 29 | 1986-07-21 14:51 UTC | 5.7 | 37.5° N, 118.37° W 9km | US | VIII (270) | 0 | 0 | |
| 30 | 1986-07-21 22:07 UTC | 5.4 | 37.64° N, 118.49° W 6km | US | VII (15) | 0 | 0 | |
| 31 | 1986-07-31 07:22 UTC | 5.5 | 37.46° N, 118.4° W 15km | US | VII (210) | 0 | 0 | |
| 32 | 1988-06-27 18:43 UTC | 5.7 | 37.13° N, 121.88° W 13km | US | VIII (6) | 0 | 0 | |
| 33 | 1989-08-08 08:13 UTC | 5.4 | 37.13° N, 121.93° W 15km | US | VII (4 k) | 1 | 1 | |
| 34 | 1989-10-18 00:04 UTC | 6.9 | 37.11° N, 121.77° W 11km | US | IX (3 k) | 62 | 63 | landslide, tsunami |
| 35 | 1991-08-17 19:29 UTC | 6.1 | 40.25° N, 124.11° W 16km | US | VIII (255) | 0 | 0 | |
| 36 | 1992-03-08 03:43 UTC | 5.4 | 40.26° N, 123.97° W 14km | US | VII (53) | 0 | 0 | |
| 37 | 1993-05-17 23:20 UTC | 6.1 | 37.15° N, 117.82° W 10km | US | VIII (6) | 0 | 0 | |
| 38 | 1994-09-12 12:23 UTC | 5.9 | 38.86° N, 119.71° W 5km | US | VIII (14 k) | 0 | 0 | |
| 39 | 1995-09-20 23:27 UTC | 5.5 | 35.63° N, 117.73° W 15km | US | VIII (852) | 0 | 0 | |
| 40 | 1995-12-28 18:27 UTC | 5.5 | 38.78° N, 119.55° W 5km | US | VII (2 k) | 0 | 0 | |
| 41 | 1997-01-22 07:17 UTC | 5.7 | 40.21° N, 124.29° W 15km | US | VII (151) | 0 | 0 | |
| 42 | 1998-08-12 14:10 UTC | 5.2 | 36.68° N, 121.53° W 9km | US | VII (1 k) | 0 | 0 | |
| 43 | 1999-05-15 13:22 UTC | 5.5 | 37.45° N, 118.8° W 1km | US | VII (4) | 0 | 0 | |
| 44 | 2000-09-03 08:36 UTC | 5 | 38.38° N, 122.41° W 10km | US | VI (77 k) | 0 | 0 | |
| 45 | 2003-12-22 19:15 UTC | 6.6 | 35.62° N, 121.07° W 16km | US | VII (213) | 2 | 2 | landslide, liquefaction |
| 46 | 2004-09-28 17:15 UTC | 6 | 35.75° N, 120.32° W 5km | US | VII (160) | 0 | 0 | |
| MMI | City | Population |
|---|---|---|
| IV | Morgan Hill | 35k |
| IV | Seven Trees | 2k |
| III | San Martin | 6k |
| III | Gilroy | 45k |
| III | San Jose | 895k |
| III | Burbank | 5k |
| III | Buena Vista | 2k |
| III | East Foothills | 8k |
| III | Milpitas | 63k |
| III | Santa Clara | 102k |
| III | Alum Rock | 14k |
| III | Interlaken | 8k |
| III | Campbell | 37k |
| III | Cambrian Park | 3k |
| III | Lexington Hills | 3k |
| III | Day Valley | 4k |
| III | Foster City | 29k |
| II | Portola Valley | 4k |
| II | El Granada | 7k |
| II | Emerald Lake Hills | 4k |
| II | Watsonville | 46k |
| II | San Juan Bautista | 2k |
| II | Amesti | 3k |
| II | Corralitos | 2k |
| II | Los Gatos | 28k |
| II | Redwood City | 72k |
| II | Aromas | 3k |
| II | San Carlos | 27k |
| II | Half Moon Bay | 12k |
| II | Pajaro | 3k |
| II | Woodside | 5k |
| II | Rio Del Mar | 9k |
| II | Monte Sereno | 3k |
| II | South San Francisco | 59k |
| II | Boulder Creek | 4k |
| II | Scotts Valley | 11k |
| II | Ben Lomond | 3k |
| II | Patterson | 16k |
| II | Aptos | 10k |
| II | Las Lomas | 3k |
| II | Tiburon | 9k |
| II | Corte Madera | 9k |
| II | Belvedere | 2k |
| II | Freedom | 6k |
| II | Pacifica | 36k |
| II | San Mateo | 90k |
| II | Grayson | 1k |
| II | Hillsborough | 10k |
| II | Soquel | 5k |
| II | Sunol | 1k |
| II | Belmont | 24k |
| II | Burlingame | 27k |
| II | Montara | 3k |
| II | Moss Beach | 2k |
| II | Santa Cruz | 55k |
| II | Live Oak | 18k |
| II | Fremont | 203k |
| II | San Francisco | 732k |
| II | Opal Cliffs | 7k |
| II | Tracy | 83k |
| II | Daly City | 99k |
| II | Felton | 1k |
| II | Millbrae | 20k |
| II | Sunnyvale | 127k |
| II | Twin Lakes | 6k |
| II | Atherton | 7k |
| II | Newman | 8k |
| II | North Fair Oaks | 16k |
| II | Colma | 1k |
| II | Elkhorn | 2k |
| II | West Menlo Park | 4k |
| II | Gustine | 6k |
| II | Saratoga | 29k |
| II | Broadmoor | 4k |
| II | East Palo Alto | 33k |
| II | Newark | 43k |
| II | Capitola | 10k |
| II | Emeryville | 8k |
| II | Hollister | 37k |
| II | Larkspur | 12k |
| II | Mountain View | 68k |
| II | San Bruno | 40k |
| II | Strawberry | 5k |
| II | Palo Alto | 57k |
| II | Stanford | 13k |
| II | Los Altos Hills | 8k |
| II | Cupertino | 51k |
| II | Oakland | 399k |
| II | Castroville | 8k |
| II | Los Altos | 27k |
| II | Brisbane | 3k |
| II | Mill Valley | 13k |
| II | Union City | 67k |
| II | Albany | 16k |
| II | Menlo Park | 29k |
| II | Riverdale Park | 1k |
| II | Prunedale | 23k |
| II | Pleasanton | 67k |
| II | San Leandro | 80k |
| II | Dublin | 39k |
| II | Ridgemark | 3k |
| II | Union City | 70k |
| II | San Lorenzo | 23k |
| II | Alameda | 70k |
| II | Ashland | 23k |
| II | Boronda | 1k |
| II | Ripon | 14k |
| II | Kentfield | 7k |
| II | Lathrop | 13k |
| II | Piedmont | 11k |
| II | Salida | 17k |
| II | Shackelford | 6k |
| II | Berkeley | 100k |
| II | Bystrom | 5k |
| II | Manteca | 66k |
| II | Modesto | 216k |
| II | Salinas | 149k |
| II | Ceres | 40k |
| II | San Rafael | 55k |
| II | Discovery Bay | 12k |
| II | Marina | 17k |
| II | Keyes | 6k |
| II | Livermore | 80k |
| II | Loyola | 4k |
| II | Sausalito | 7k |
| II | Hayward | 140k |
| II | Santa Venetia | 5k |
| II | Turlock | 68k |
| II | Cherryland | 16k |
| II | San Anselmo | 12k |
| II | Richmond | 103k |
| II | French Camp | 5k |
| II | Los Banos | 33k |
| II | Del Rio | 1k |
| II | San Ramon | 45k |
| II | Empire | 4k |
| II | Kensington | 5k |
| II | San Pablo | 31k |
| II | Hughson | 7k |
| II | Ross | 2k |
| II | Delhi | 12k |
| II | Fairview | 10k |
| II | Seaside | 36k |
| II | Denair | 3k |
| II | El Cerrito | 23k |
| II | Novato | 49k |
| I | Del Rey Oaks | 2k |
| I | East Richmond Heights | 3k |
| I | Chualar | 2k |
| I | Escalon | 7k |
| I | Kennedy | 4k |
| I | Stockton | 290k |
| I | Country Club | 10k |
| I | Moraga | 17k |
| I | Brentwood | 47k |
| I | Livingston | 12k |
| I | Bethel Island | 2k |
| I | Oakley | 27k |
| I | Pacific Grove | 15k |
| I | Rollingwood | 3k |
| I | Castro Valley | 63k |
| I | Danville | 43k |
| I | Garden Acres | 11k |
| I | Lincoln Village | 4k |
| I | August | 9k |
| I | Riverbank | 19k |
| I | Fairfax | 7k |
| I | Waterford | 9k |
| I | Benicia | 27k |
| I | Gonzales | 9k |
| I | Oakdale | 19k |
| I | Martinez | 37k |
| I | El Sobrante | 14k |
| I | Carmel-by-the-Sea | 4k |
| I | Diablo | 1k |
| I | Atwater | 30k |
| I | Morada | 4k |
| I | Alamo | 18k |
| I | Orinda | 18k |
| I | Winton | 10k |
| I | Tara Hills | 6k |
| I | Monterey | 30k |
| I | Pinole | 20k |
| I | South Dos Palos | 2k |
| I | Antioch | 106k |
| I | Dos Palos | 5k |
| I | Linden | 1k |
| I | Mountain View | 2k |
| I | Del Monte Forest | 4k |
| I | East Oakdale | 3k |
| I | Lafayette | 25k |
| I | Vine Hill | 3k |
| I | Angels Camp | 3k |
| I | Bay Point | 22k |
| I | Bolinas | 1k |
| I | Carmel Valley Village | 5k |
| I | Clayton | 11k |
| I | Columbia | 3k |
| I | Concord | 126k |
| I | Copperopolis | 3k |
| I | Crockett | 3k |
| I | Firebaugh | 7k |
| I | Hercules | 24k |
| I | Inverness | 1k |
| I | Jamestown | 4k |
| I | Mendota | 9k |
| I | Merced | 73k |
| I | Pacheco | 4k |
| I | Pittsburg | 63k |
| I | Pleasant Hill | 34k |
| I | Rodeo | 9k |
| I | Sonora | 5k |
| I | Vallejo | 120k |
| I | Waldon | 6k |
| I | Walnut Creek | 65k |
| I | Woodacre | 1k |
(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.
