Liquefaction probability for M6.7 Hayward Fault earthquake ...€¦ · The map assumes the...
1
Liquefaction probability 30 to 40% 20 to 30% 10 to 20% 5 to 10% 0 to 5% Not assigned Legend Not studied Bedrock Water Hayward Fault Major highways Streets Liquefaction probability for M6.7 Hayward Fault earthquake scenario, Santa Clara County, CA 280 280 680 680 880 85 85 237 17 17 101 101 121°45'0"W 121°52'30"W 121°52'30"W 122°0'0"W 122°0'0"W 122°7'30"W 122°7'30"W 37°22'30"N 37°22'30"N 37°15'0"N 37°15'0"N Hayward Fault San Francisco Bay San Jose 0 5 Miles 0 8 Kilometers Open File Report 2008-1270 This map shows the likelihood of liquefaction in Northern Santa Clara County during a magnitude 7.0 earthquake on the southern segment of the Hayward Fault shown on the location map. This earthquake is similar to the 1868 Hayward earthquake. At each location, the map predicts the approximate probability that shallow wet sands will liquefy and cause surface manifestations of liquefaction such as sand boils and ground cracking. Liquefaction is a phenomenon that is caused by earthquake shaking. Wet sand can become liquid-like when strongly shaken. The liquefied sand may flow and the ground may move and crack, causing damage to surface structures and underground utilities.The map depicts the hazard at a regional scale and should not be used for site-specific design and consideration. Subsurface conditions can vary abruptly and borings are required to address the hazard at a given location. The map assumes the historically shallowest water table conditions and does not reflect current ground-water conditions. If the current water table is deeper, the probability of liquefaction is reduced. The map includes the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos, Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale. by Thomas L. Holzer, Thomas E. Noce, and Michael J. Bennett Location map Milpitas Sunnyvale Palo Alto
Transcript of Liquefaction probability for M6.7 Hayward Fault earthquake ...€¦ · The map assumes the...
Liquefaction probability30 to 40%20 to 30%10 to 20%5 to 10%0 to 5%Not assigned
LegendNot studiedBedrockWaterHayward FaultMajor highwaysStreets
Liquefaction probability for M6.7 Hayward Fault earthquake scenario, Santa Clara County, CA
280
280
680
680
880
85
85
237
17
17
101
101
121°45'0"W
121°52'30"W
121°52'30"W
122°0'0"W
122°0'0"W
122°7'30"W
122°7'30"W
37°22'30"N37°22'30"N
37°15'0"N37°15'0"N
Hayward FaultSan Francisco Bay
San Jose
0 5 Miles
0 8 Kilometers
Open File Report 2008-1270
This map shows the likelihood of liquefaction in Northern Santa Clara County during a magnitude 7.0 earthquake on the southern segment of the Hayward Fault shown on the location map. This earthquake is similar to the 1868 Hayward earthquake.At each location, the map predicts the approximate probability that shallow wet sands will liquefy and cause surface manifestations of liquefaction such as sand boils and ground cracking. Liquefaction is a phenomenon that is caused by earthquake shaking. Wet sand can become liquid-like when strongly shaken. The liquefied sand may flow and the ground may move and crack, causing damage to surface structures and underground utilities.The map depicts the hazard at a regional scale and should not be used for site-specific design and consideration. Subsurface conditions can vary abruptly and borings are required to address the hazard at a given location. The map assumes the historically shallowest water table conditions and does not reflect current ground-water conditions. If the current water table is deeper, the probability of liquefaction is reduced. The map includes the communities of San Jose, Campbell, Cupertino, Los Altos, Los Gatos, Milpitas, Mountain View, Palo Alto, Santa Clara, Saratoga, and Sunnyvale.
by Thomas L. Holzer, Thomas E. Noce, and Michael J. Bennett
Location map
Milpitas
Sunnyvale
Palo Alto
