ABAG Shaken
Awake! Report
Greenville Earthquake
from
the 1996 report (NOT updated with 2003 data)
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ABAG Shaken
Awake! Report |
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from
the 1996 report (NOT updated with 2003 data)
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Regional Map of Ground Shaking Intensity from the Greenville Earthquake
This scenario earthquake is for a magnitude 7.1 earthquake on the Greenville fault in far eastern Contra Costa, Alameda and Santa Clara counties. This fault was the source of the Livermore earthquake.
Over the Bay Area as a whole, the impact of an earthquake along the Greenville fault would be significantly less devastating than events along the Hayward or Healdsburg-Rodgers Creek faults. Of the estimates outlined in this report, the total damage forecasts for an event along the Greenville fault are the next to lowest ones. Of the total number of uninhabitable dwelling units of 5,230, almost 80% of these are located in Alameda or Contra Costa counties.
Although the fault is geographically located within the eastern-most sections of Alameda, Contra Costa, and Santa Clara counties, the damage forecast for San Francisco County is still high. Overall, the construction types accounting for most of the uninhabitable units are 1-3 story wood-frame multi-family built after 1939 (36%) and mobile homes (19%).
Alameda and Contra Costa counties are projected to generate the largest peak shelter populations. These two counties combined will account for over 78% of the total peak shelter population. San Francisco County, which accounts for a high percentage of the total shelter population in most other scenarios, is projected to account for only 11% of the total. Of the eleven scenarios, the Greenville earthquake projected shelter population for San Francisco is the lowest for this city.
However, the shelter pattern between older urban counties and newer suburban counties is repeated here -- while in Alameda County 64% are projected to come from yellow-tagged dwelling units, in Contra Costa County 66% are expected to come from red-tagged dwelling units. It appears that the older and denser counties generate shelter populations with less severe damage to their buildings.
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ABAG, the Association of Bay Area Governments, is the regional planning and services agency for the nine-county San Francisco Bay Area.This page was last updated 10/20/03 by jbp.
