Difference between revisions 113734548 and 113734549 on dewiki

[[Image:122-38HaywardFault.jpg|thumb|300px|For recent activity in the region shown on this map see [http://quake.wr.usgs.gov/recenteqs/FaultMaps/122-38.htm the USGS map for this location.] With appropriate browser settings the "live" maps will also show all of the names of faults shown on the map as you rollover with the cursor.]]

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The 1868 earthquake occurred well before the [[East Bay (California)|East Bay]] region was extensively urbanized.<ref>[http://www.museumoflocalhistory.org/pages/list.php?topic=earthquake Museum of Local History, Links to the 1868 Earthquake]</ref> The following year, in 1869, the William Meek Estate became one of the first developments in the area, built on 3,000 acres
 (12 km²) in what became known as the Cherryland district of Eden Township. <ref>[http://www.haywardareahistory.org/meek.html Meek Estate], Hayward Area Historical Society</ref> Recent renovations of the Meek Mansion have revealed that with the 1868 earthquake still fresh in minds of residents of the time, some unusual diagonal bracing was built into the original construction.<ref>Historic Meek Mansion hides surprises, by Matt O'Brien, Oakland Tribune, November 20, 2006, Metro 4</ref> Al(contracted; show full)

==Fault effects==
[[Image:HaywardFaultCreep.jpg|thumb|right|175px|Fault creep has displaced this [[Fremont, California]], curb since its construction about 15 years previous. A major event here would cause a displacement of four to six feet (1.2 to 1.8 m
eters) in less than a minute]]
===Fault creep===
:''Main article: [[Aseismic creep]]''
The surface of the fault is creeping at less than 0.5 cm (0.2 in) per year in the regions of concern. Extreme southern regions of the fault are creeping faster, perhaps sufficiently to prevent fault rupture there, but mostly the creep is insufficient to relieve the accumulating forces upon most of the fault and so will not prevent a large earthquake. The creep is sufficient to displace roads, curbs, and sid(contracted; show full)
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===Special exhibit===
Fremont Earthquake Exhibit: ''The Hayward Fault Exposed''
[[Image:HaywardFaultExposed5911.JPG|left|250px|thumb|A docent leads a visitor to a viewing platform within the pit. Click image for more information]]
This [[geotourism]] exhibit (April through October 2006, now closed) featured a 12- to 
15-foot{{convert|15|ft|m|0|sing=on}} deep pit exposing the Hayward Fault, which could be viewed "face to face" from a shaded platform by descending a staircase. Significant features were noted and marked. Similar trench excavations are used in the determination of the frequency and magnitude of prehistoric earthquakes and to determine the location of latent faults as part of the science of [[Paleoseismology]]
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[[Category:Contra Costa County, California]]
[[Category:Solano County, California]]
[[Category:Napa County, California]]
[[Category:San Francisco Bay Area]]


[[fr:Faille de Hayward]]