PAGER - M 4.0 - 3 km ENE of Alamo, 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?Saturday, September 6th, 2008 at 04:00:15 UTC (21:00:15 local)Location: 37.9° N, 122° WDepth: 16kmEvent Id: NC51207740Alert Version: 1Created: 106 weeks, 6 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 | 2,353k* | 5,928k | 1,171k | 308k | 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 | 292 | 5.1 | V (17k) | 0 |
| 1989-10-18 | 86 | 6.9 | IX (3k) | 62 |
| 2003-12-22 | 263 | 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 |
|---|---|---|
| V | Danville | 43k |
| V | San Ramon | 45k |
| V | Alamo | 18k |
| V | Moraga | 17k |
| V | Diablo | 1k |
| V | Walnut Creek | 65k |
| IV | Oakland | 399k |
| III | San Francisco | 732k |
| II | Stockton | 290k |
| II | San Jose | 895k |
| I | Sacramento | 468k |
(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 | 1978-10-04 16:42 UTC | 5.4 | 37.39° N, 118.69° W 8km | US | VI (598) | 0 | 0 | |
| 3 | 1979-08-06 17:05 UTC | 5.7 | 37.07° N, 121.6° W 8km | US | VIII (152) | 0 | 0 | |
| 4 | 1980-01-24 19:00 UTC | 5.8 | 37.71° N, 121.73° W 15km | US | VII (31 k) | 1 | 1 | |
| 5 | 1980-01-27 02:33 UTC | 5.8 | 37.74° N, 121.74° W 15km | US | VI (371 k) | 0 | 0 | |
| 6 | 1980-05-25 16:33 UTC | 6.2 | 37.53° N, 118.83° W 11km | US | IX (72) | 0 | 0 | landslide |
| 7 | 1980-05-25 16:49 UTC | 5.9 | 37.55° N, 119.02° W 3km | US | VIII (16) | 0 | 0 | |
| 8 | 1980-05-25 19:44 UTC | 5.9 | 37.38° N, 118.84° W 4km | US | VII (2) | 0 | 0 | landslide |
| 9 | 1980-05-25 20:35 UTC | 5.9 | 37.44° N, 118.96° W 2km | US | VI (6 k) | 0 | 0 | |
| 10 | 1980-05-25 20:59 UTC | 5.5 | 37.59° N, 118.83° W 10km | US | VII (660) | 0 | 0 | |
| 11 | 1980-05-26 12:24 UTC | 5.6 | 37.58° N, 118.9° W 2km | US | VII (2 k) | 0 | 0 | |
| 12 | 1980-05-26 18:57 UTC | 5.7 | 37.56° N, 118.9° W 6km | US | VII (2 k) | 0 | 0 | |
| 13 | 1980-05-27 14:50 UTC | 5.9 | 37.42° N, 118.8° W 1km | US | VIII (3) | 0 | 0 | |
| 14 | 1981-09-30 11:53 UTC | 5.6 | 37.55° N, 118.8° W 15km | US | VII (591) | 0 | 0 | |
| 15 | 1983-05-02 23:42 UTC | 6.3 | 36.22° N, 120.3° W 10km | US | IX (29) | 0 | 0 | |
| 16 | 1983-05-02 23:46 UTC | 5.7 | 36.23° N, 120.29° W 8km | US | VIII (1 k) | 0 | 0 | |
| 17 | 1983-07-09 07:40 UTC | 5.1 | 36.17° N, 120.37° W 1km | US | VII (10 k) | 0 | 0 | |
| 18 | 1983-07-22 02:39 UTC | 5.7 | 36.2° N, 120.34° W 7km | US | VII (1 k) | 0 | 0 | |
| 19 | 1983-08-24 13:36 UTC | 6.2 | 40.29° N, 124.62° W 24km | US | VII (2 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 | 1987-07-31 23:56 UTC | 6 | 40.39° N, 124.2° W 18km | US | VIII (4) | 0 | 0 | |
| 33 | 1988-06-27 18:43 UTC | 5.7 | 37.13° N, 121.88° W 13km | US | VIII (6) | 0 | 0 | |
| 34 | 1989-08-08 08:13 UTC | 5.4 | 37.13° N, 121.93° W 15km | US | VII (4 k) | 1 | 1 | |
| 35 | 1989-10-18 00:04 UTC | 6.9 | 37.11° N, 121.77° W 11km | US | IX (3 k) | 62 | 63 | landslide, tsunami |
| 36 | 1991-08-17 19:29 UTC | 6.1 | 40.25° N, 124.11° W 16km | US | VIII (255) | 0 | 0 | |
| 37 | 1992-03-08 03:43 UTC | 5.4 | 40.26° N, 123.97° W 14km | US | VII (53) | 0 | 0 | |
| 38 | 1992-04-25 18:06 UTC | 7.2 | 40.35° N, 124.07° W 19km | US | IX (2 k) | 0 | 0 | landslide, liquefaction, tsunami |
| 39 | 1992-04-26 07:41 UTC | 6.5 | 40.55° N, 124.25° W 31km | US | IX (1 k) | 0 | 0 | |
| 40 | 1992-04-26 11:18 UTC | 6.6 | 40.43° N, 124.41° W 25km | US | IX (40) | 0 | 0 | |
| 41 | 1993-05-17 23:20 UTC | 6.1 | 37.15° N, 117.82° W 10km | US | VIII (6) | 0 | 0 | |
| 42 | 1994-09-12 12:23 UTC | 5.9 | 38.86° N, 119.71° W 5km | US | VIII (14 k) | 0 | 0 | |
| 43 | 1994-12-26 14:10 UTC | 5.5 | 40.71° N, 124.04° W 26km | US | VII (85 k) | 0 | 0 | |
| 44 | 1995-12-28 18:27 UTC | 5.5 | 38.78° N, 119.55° W 5km | US | VII (2 k) | 0 | 0 | |
| 45 | 1997-01-22 07:17 UTC | 5.7 | 40.21° N, 124.29° W 15km | US | VII (151) | 0 | 0 | |
| 46 | 1998-08-12 14:10 UTC | 5.2 | 36.68° N, 121.53° W 9km | US | VII (1 k) | 0 | 0 | |
| 47 | 1999-05-15 13:22 UTC | 5.5 | 37.45° N, 118.8° W 1km | US | VII (4) | 0 | 0 | |
| 48 | 2000-09-03 08:36 UTC | 5 | 38.38° N, 122.41° W 10km | US | VI (77 k) | 0 | 0 | |
| 49 | 2003-12-22 19:15 UTC | 6.6 | 35.62° N, 121.07° W 16km | US | VII (213) | 2 | 2 | landslide, liquefaction |
| 50 | 2004-09-28 17:15 UTC | 6 | 35.75° N, 120.32° W 5km | US | VII (160) | 0 | 0 | |
| MMI | City | Population |
|---|---|---|
| V | Danville | 43k |
| V | Alamo | 18k |
| V | San Ramon | 45k |
| V | Moraga | 17k |
| V | Diablo | 1k |
| V | Walnut Creek | 65k |
| V | Waldon | 6k |
| V | Pleasant Hill | 34k |
| V | Lafayette | 25k |
| IV | Orinda | 18k |
| IV | Dublin | 39k |
| IV | Concord | 126k |
| IV | Pacheco | 4k |
| IV | Fairview | 10k |
| IV | Castro Valley | 63k |
| IV | Ashland | 23k |
| IV | San Leandro | 80k |
| IV | Clayton | 11k |
| IV | Union City | 70k |
| IV | Cherryland | 16k |
| IV | Alameda | 70k |
| IV | Oakland | 399k |
| IV | Piedmont | 11k |
| IV | Pleasanton | 67k |
| III | Daly City | 99k |
| III | Hayward | 140k |
| III | Bay Point | 22k |
| III | San Lorenzo | 23k |
| III | South San Francisco | 59k |
| III | Fremont | 203k |
| III | Pittsburg | 63k |
| III | Vine Hill | 3k |
| III | Albany | 16k |
| III | San Francisco | 732k |
| III | Berkeley | 100k |
| III | Colma | 1k |
| III | El Cerrito | 23k |
| III | Brentwood | 47k |
| III | Kensington | 5k |
| III | Mountain View | 2k |
| III | Antioch | 106k |
| III | Brisbane | 3k |
| III | Broadmoor | 4k |
| III | Newark | 43k |
| III | Oakley | 27k |
| III | Millbrae | 20k |
| III | Union City | 67k |
| III | East Richmond Heights | 3k |
| III | Richmond | 103k |
| III | Hercules | 24k |
| III | San Bruno | 40k |
| III | Sunol | 1k |
| III | Benicia | 27k |
| III | Discovery Bay | 12k |
| III | Suisun City | 27k |
| III | Bethel Island | 2k |
| III | Pacifica | 36k |
| III | Martinez | 37k |
| III | Foster City | 29k |
| III | Rollingwood | 3k |
| III | El Sobrante | 14k |
| III | San Pablo | 31k |
| III | Hillsborough | 10k |
| III | Pinole | 20k |
| III | Tara Hills | 6k |
| III | Montara | 3k |
| III | Sausalito | 7k |
| III | Rodeo | 9k |
| III | Emeryville | 8k |
| III | Fairfield | 106k |
| III | Crockett | 3k |
| III | San Mateo | 90k |
| III | Moss Beach | 2k |
| III | Burlingame | 27k |
| III | Livermore | 80k |
| III | Rio Vista | 7k |
| II | North Fair Oaks | 16k |
| II | El Granada | 7k |
| II | Mill Valley | 13k |
| II | Vallejo | 120k |
| II | Tracy | 83k |
| II | East Palo Alto | 33k |
| II | Redwood City | 72k |
| II | Vacaville | 96k |
| II | Strawberry | 5k |
| II | Atherton | 7k |
| II | Corte Madera | 9k |
| II | Larkspur | 12k |
| II | San Carlos | 27k |
| II | Country Club | 10k |
| II | Belvedere | 2k |
| II | Palo Alto | 57k |
| II | Tiburon | 9k |
| II | Ross | 2k |
| II | Lincoln Village | 4k |
| II | Kentfield | 7k |
| II | Stockton | 290k |
| II | Belmont | 24k |
| II | Emerald Lake Hills | 4k |
| II | Fairfax | 7k |
| II | French Camp | 5k |
| II | Lathrop | 13k |
| II | Green Valley | 2k |
| II | San Rafael | 55k |
| II | Menlo Park | 29k |
| II | August | 9k |
| II | Lexington Hills | 3k |
| II | Dixon | 16k |
| II | Kennedy | 4k |
| II | Milpitas | 63k |
| II | San Anselmo | 12k |
| II | Woodacre | 1k |
| II | Garden Acres | 11k |
| II | Morada | 4k |
| II | Woodside | 5k |
| II | Half Moon Bay | 12k |
| II | Lodi | 63k |
| II | Manteca | 66k |
| II | Santa Clara | 102k |
| II | American Canyon | 16k |
| II | Burbank | 5k |
| II | West Menlo Park | 4k |
| II | Santa Venetia | 5k |
| II | Stanford | 13k |
| II | Bolinas | 1k |
| II | Campbell | 37k |
| II | Seven Trees | 2k |
| II | Buena Vista | 2k |
| II | Winters | 7k |
| II | San Jose | 895k |
| II | Ripon | 14k |
| II | Sunnyvale | 127k |
| II | Monte Sereno | 3k |
| II | Davis | 66k |
| II | Los Gatos | 28k |
| II | Grayson | 1k |
| II | Napa | 77k |
| II | Galt | 24k |
| II | Portola Valley | 4k |
| II | Boulder Creek | 4k |
| II | Linden | 1k |
| II | Ben Lomond | 3k |
| II | Salida | 17k |
| II | Petaluma | 55k |
| II | Cambrian Park | 3k |
| II | Laguna | 47k |
| II | Lockeford | 3k |
| II | Cupertino | 51k |
| II | Novato | 49k |
| II | Del Rio | 1k |
| II | Elk Grove | 95k |
| II | Yountville | 3k |
| II | Escalon | 7k |
| II | Patterson | 16k |
| II | Riverdale Park | 1k |
| II | Scotts Valley | 11k |
| II | West Sacramento | 41k |
| II | Felton | 1k |
| II | Los Altos Hills | 8k |
| I | Sacramento | 468k |
| I | Cottonwood | 4k |
| I | Esparto | 2k |
| I | Saratoga | 29k |
| I | Loyola | 4k |
| I | Woodland | 52k |
| I | Modesto | 216k |
| I | Shackelford | 6k |
| I | Florin | 30k |
| I | Los Altos | 27k |
| I | East Foothills | 8k |
| I | Wilton | 5k |
| I | Alum Rock | 14k |
| I | Bystrom | 5k |
| I | Deer Park | 1k |
| I | Morgan Hill | 35k |
| I | Ceres | 40k |
| I | Saint Helena | 6k |
| I | Day Valley | 4k |
| I | La Riviera | 10k |
| I | Eldridge | 2k |
| I | Mountain View | 68k |
| I | Rosemont | 23k |
| I | Empire | 4k |
| I | Riverbank | 19k |
| I | Keyes | 6k |
| I | Oakdale | 19k |
| I | Hughson | 7k |
| I | San Martin | 6k |
| I | Angwin | 3k |
| I | Newman | 8k |
| I | Inverness | 1k |
| I | Rancho Cordova | 59k |
| I | Foothill Farms | 18k |
| I | Rohnert Park | 41k |
| I | Carmichael | 51k |
| I | Roseland | 6k |
| I | Turlock | 68k |
| I | Rio Linda | 11k |
| I | Gold River | 9k |
| I | Gustine | 6k |
| I | North Highlands | 46k |
| I | Sebastopol | 8k |
| I | Bodega Bay | 2k |
| I | Boyes Hot Springs | 7k |
| I | Calistoga | 5k |
| I | Cameron Park | 16k |
| I | Cotati | 7k |
| I | Deer Park | 1k |
| I | Delhi | 12k |
| I | Denair | 3k |
| I | Diamond Springs | 6k |
| I | East Oakdale | 3k |
| I | El Dorado Hills | 25k |
| I | El Verano | 4k |
| I | Fair Oaks | 29k |
| I | Folsom | 68k |
| I | Forestville | 2k |
| I | Graton | 2k |
| I | Guerneville | 3k |
| I | Healdsburg | 11k |
| I | Ione | 8k |
| I | Jackson | 4k |
| I | Los Banos | 33k |
| I | Monte Rio | 1k |
| I | Occidental | 1k |
| I | Orangevale | 27k |
| I | Plymouth | 1k |
| I | Rancho Calaveras | 4k |
| I | Rancho Murieta | 6k |
| I | Santa Rosa | 155k |
| I | Shingle Springs | 3k |
| I | Sonoma | 10k |
| I | Sutter Creek | 2k |
| I | Temelec | 2k |
| I | Valley Springs | 3k |
| I | Waterford | 9k |
| I | Windsor | 25k |
(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.
