Civil Engineering Reference
In-Depth Information
the 1906 San Francisco earthquake, what type of damage would be expected for this house?
Answer:
Based on Fig. 2.20, you should expect a modified Mercalli level of damage of IX,
which corresponds to heavy damage. per Table 2.3, at a level of IX, well-designed frame
structures are thrown out of plumb.
U.S.G.S. Estimated Intensity Map
1905 Earthquake on San Andreas Fault
GMT
Dec 17 09:02
• Cloverdale
• Geyserville
km
0
10
20
• Santa Rosa
• Vacaville
• Sonoma
Bodega Bay
• Petaluma
• Vallejo
• San Rafael
38N
• Concord
Stockton
• Walnut Creek
• Berkeley
San Francisco
• Oakland
• Dublin
• Livermore
X- Extreme Damage
• Hayward
IX- Heavy Damage
• Fremont
VIII- Moderate Damage
Half Moon Bay
VII- Light Damage
• Sunnyvale
• San Jose
VI- Minimal Damage
V- Strongly Felt
Boulder Creek
Morgan Hill
II-IV - Lightly to Moderately Felt
37N
I- Not Felt
Undefined (White)
• Santa Cruz
• Hollister
123W
122W
FIGURe 2.20
USGS estimated intensity map for a repeat of the 1906 San Francisco earthquake. (
Prepared
by USGS.
)
