Losses from past earthquakes
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Northridge
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M6.7 January 17, 1994
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$46 bill |
estimate from CA Office of Emergency Services (2000 dollars) |
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Loma Prieta
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M6.9 October 17, 1989
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$10 bill |
estimate from National Research Council (1994) (2000 dollars) |
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San Fernando
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M6.6 February 9, 1971
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$10 bill |
estimate from FEMA (1997) (2000 dollars) |
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Estimates of future losses
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Future losses can be estimated for specific senario earthquakes,
e.g. a repeat of the 1906 San Francisco earthquake,
or then can be annualized meaning the average cost of earthquakes
per year.
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Northern California
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Repeat of the 1906 San Francisco earthquake M7.9
Impacting the San Francisco peninsula and costal region to the north.
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$54 bill |
Losses due to building damage only. From Rowshandel et al, CGS. |
$170-225 bill |
Includes all potential losses to buildings, transportation,
utility systems etc and seconday effects such as fire and toxic releases.
From the 1995 Risk Management SOlutions study. |
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Hayward fault rupture (north and south segments) M6.9
Impacting East-Bay Cities
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$23 bill |
Losses due to building damage only. From Rowshandel et al, CGS. |
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Hayward + Rodgers Creek faults M7.3
Impacting East-Bay Cities and regions to the north.
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$34 bill |
Losses due to building damage only. From Rowshandel et al, CGS. |
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Southern California
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Puente Hills fault M7.1
Thrust fault beneath much of the LA basin
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$69 bill |
Losses due to building damage only. From Rowshandel et al, CGS. |
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Newport-Inglewood fault M6.9
Strike-slip fault beneath the LA basin
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$49 bill |
Losses due to building damage only. From Rowshandel et al, CGS. |
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These are just a few examples of some of the most damaging scenario earthquakes. For the (much) longer list of all senario earthquakes that have been identified see the full report:
Rowshandel et al, CGS, 8.3Mb pdf
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Annualized losses
Annualized losses represent the long term, average losses due to potential ground motion hazards of all expected earthquakes in the region.
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$2.2 bill |
This is the average annual losses due to building damage only across California. From Rowshandel et al, CGS. |
$104 |
This is the average annual loss per capita due to building damage only in California. From Rowshandel et al, CGS. |
0.15% |
This is the average annual loss ratio for building across California. This means that, state-wide and on average, earthquake ground motions are expected to cause damage to buildings equal to 0.15% of the dollar values each year. From Rowshandel et al, CGS.
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