Most people have heard of the San Andreas, which they assume will be the source of the next big quake in the Bay Area, thanks in part to Hollywood disaster movies, such as the dreadful “San Andreas,” which perpetuate geologic absurdities. Despite the notoriety of the San Andreas Fault, it is not the greatest seismic threat to the Bay Area. East of San Francisco, across the muddy, green waters of San Francisco Bay, sits a smaller fracture in the crust: the Hayward Fault. One day, the Hayward Fault could produce the greatest natural disaster ever to hit the United States.
The Hayward Fault splinters from the Calaveras Fault, which itself is an offshoot of the San Andreas Fault, near Hollister, south of the Bay Area. All three faults are right-lateral strike-slip faults. The Hayward Fault is shorter than the San Andreas, running about 70 kilometers from Fremont to Point Pinole, and is therefore not expected to produce the magnitude-8-plus quakes we know the San Andreas can generate. But what the Hayward Fault lacks in potential magnitude, it makes up for with proximity to people, lying directly under structures where many people live and work: hospitals, schools, retirement homes, and house after house after house.
The San Andreas cuts predominantly through remote areas, whereas the entire length of the Hayward Fault runs through densely populated cities such as Oakland (pop. 406,000), Fremont (pop. 224,000) and Berkeley (pop. 116,000), and is not far from the metropolises of San Francisco (pop. 805,000) and San Jose (pop. 945,000). The U.S. Geological Survey (USGS) describes the Hayward Fault as “the single most urbanized earthquake fault in the United States.”
【 在 jobhuntinger (jobhuntinger) 的大作中提到: 】 本来是生死有命，富贵在天的事情。你就喜欢被打脸，没办法。San Andrea离 Cupertino还算有点距离，Hayward fault可是贯穿Fremont. 你看看人专业的怎么说。 http://www.earthmagazine.org/article/most-dangerous-fault-america Most people have heard of the San Andreas, which they assume will be the source of the next big quake in the Bay Area, thanks in part to Hollywood : disaster movies, such as the dreadful “San Andreas,” which perpetuate geologic absurdities. Despite the notoriety of the San Andreas Fault, it is not the greatest seismic threat to the Bay Area. East of San Francisco, across the muddy, green waters of San Francisco Bay, sits a smaller fracture in the crust: the Hayward Fault. One day, the Hayward Fault could produce ...................
【 在 jobhuntinger (jobhuntinger) 的大作中提到: 】 本来是生死有命，富贵在天的事情。你就喜欢被打脸，没办法。San Andrea离 Cupertino还算有点距离，Hayward fault可是贯穿Fremont. 你看看人专业的怎么说。 http://www.earthmagazine.org/article/most-dangerous-fault-america Most people have heard of the San Andreas, which they assume will be the source of the next big quake in the Bay Area, thanks in part to Hollywood : disaster movies, such as the dreadful “San Andreas,” which perpetuate geologic absurdities. Despite the notoriety of the San Andreas Fault, it is not the greatest seismic threat to the Bay Area. East of San Francisco, across the muddy, green waters of San Francisco Bay, sits a smaller fracture in the crust: the Hayward Fault. One day, the Hayward Fault could produce ...................
湾区有举世闻名的圣安德鲁斯断层。这一段断层除了提供9级地震大奖之外。就是一个
源源不断的放射性气体提供源。早年我曾经请教建筑设计的同学关于断层和建筑防震问题。同学压根没担心地震。他说他最担心的是放射性污染。断层是地壳的一个伤口。岩层里积聚的放射性被层层岩石阻挡，断层就是一个排放阀门。
我仔细查看，果然是。半岛的辐射问题真的很严重。带着盖格计数器到太平洋一侧的沙滩走一走可以吓死你。一个小时可以超过一年所能承受的辐射量。圣安德鲁斯断层从三番西南登陆经过Crystal Spring直插裤破涕落的后院。湾区最近的一次大地震1989年地震裤破涕落就在震中。地壳破坏最严重，因此放射性气体问题也最严重。想象一下每年接触几千倍的许可放射量。
这个放射性问题有多强？三番金银岛原来是海军基地，处理各种核武器及核废料。不少军用核废料经过金银岛转运最终在三番外海的法伦群岛丢进太平洋。金银岛转为民用后与军方有争议辐射太强不适合人类居住。军方坚持已经清理干净。最终军方决定全湾区普查放射性证明这是湾区自然问题。一查最后事情不了了之。猜不到开头猜得到结果。美国真不讲人权。半岛、裤破涕落这么不适合人类居住的地方比核设施放射性还牛掰藏着掖着还修房子卖给老中人傻钱多住。
对于那些被骗住进死亡住宅的。我深表同情。后来人们千万小心。反正当初我是宁可上班多开20分钟也要离这无影无形的死亡区远一点。挣钱不容易啊。那谁说的富贵险中求。你们赚得多有道理，应该好好享受。我非盟零检出。活该一辈子涨不起来。
博体楼
望继续
非盟人口是裤破涕落的好多倍。你就直说非盟的不配做人不就完了。
如果要买房，location、location、location。举例说破落丫头我记得大概是30%的房
子放射性超标。长个心眼。你肯定来不及检查（需时）或下不了购买条件。会点风水会有帮助。如地质条件，离圣安德鲁斯断层多远。
另外，前任房东怎么死的有没有癌症也有参考意义。如乔布斯的房子你有钱你买不买。
就是说其深度到达地幔分割两个板块。希活断层只是北美大陆的小混混，没有到达地幔，否则就多了一个湾区板块了。
2、任何断层包括希活断层也会有放射性泄漏问题。所以还要看接近地表的地质条件。
非盟政府/房东们也关心这个问题。但非盟是零超标。我理解是断层旁的房子都不超标
，其它离断层更远的房子更不用担心这个。
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盖格计数器，测伽马射线的
持盖格器测过的。我看的房子周边还都比较正常。你是不是危言耸听？
另外说到地震断层，Hayward fault 不是直接穿过fremont 吗？圣安德鲁斯断层并不穿过Cupertino, 你看seismic map都有的。
上面的数据显示好像就 Los Gatos 高些，其他还好啊。
当然看房子拿着两个仪表在别人眼里挺怪的。有人还以为我测风水呢。
圣荷西Almaden多年的mercury超标。也没妨碍人家成为好区。
这个撕裂是因为淘金时代49号黄金公路上炸掉了太多的山体。大量的碎屑顺着河网沉积在三角洲以及湾区。改变了跷跷板的平衡，压裂了地壳并触发一系列大型地震。包括
1868年6.9级的希活地震。
题外话，所以加州人特痛恨水裂法。放着世界特大油田立法不开采（圣安德鲁斯断层从油区中间通过）。而那啥州要钱不要命新兴采油的现在地震也创了纪录。
淘金时代结束后，湾区再无7级以上大型地震。唯一可能7级以上的就剩下圣安德鲁斯断层。
这个破裂在震中最厉害。在两端的撕裂深度就小得多。直接穿过非盟不假。但是从深度等指标看毛都不算。去Death Valley走trail走个几百米比这牛的断层都能看到3个。
断层是一个。断层上的地质条件是另一个。Location、location、location。破落丫头也有2/3的没抄表。放射性从另外1/3的热点跑出来。Open house时测不准。氡有两个值，24小时和1个月累积计数。
我说的问题不仅仅是氡。还有经过万年氡辐射过的土壤泥沙问题。这些放射性泥沙碎石年复一年地从山上被风雨运输下来沉积在山下扇面上。你见过这种扇面就知道我说什么。Death Valley由于没有人为因素这种冲积扇面看得特别清楚。裤破涕落等就建筑在这样的扇面上。太平洋的沙滩就是问题的另一面。
可是政府有提供全国的土壤氡气状况图。Cupertino, Sunnyvale, MV, San Jose, 都是median, 高的大部分在东北部。网上可查。
容易在地下室和不通风的地方沉积。
Cupertino还算有点距离，Hayward fault可是贯穿Fremont. 你看看人专业的怎么说。
http://www.earthmagazine.org/article/most-dangerous-fault-america
Most people have heard of the San Andreas, which they assume will be the
source of the next big quake in the Bay Area, thanks in part to Hollywood
disaster movies, such as the dreadful “San Andreas,” which perpetuate
geologic absurdities. Despite the notoriety of the San Andreas Fault, it is not the greatest seismic threat to the Bay Area. East of San Francisco,
across the muddy, green waters of San Francisco Bay, sits a smaller fracture in the crust: the Hayward Fault. One day, the Hayward Fault could produce
the greatest natural disaster ever to hit the United States.
The Hayward Fault splinters from the Calaveras Fault, which itself is an
offshoot of the San Andreas Fault, near Hollister, south of the Bay Area.
All three faults are right-lateral strike-slip faults. The Hayward Fault is shorter than the San Andreas, running about 70 kilometers from Fremont to
Point Pinole, and is therefore not expected to produce the magnitude-8-plus quakes we know the San Andreas can generate. But what the Hayward Fault
lacks in potential magnitude, it makes up for with proximity to people,
lying directly under structures where many people live and work: hospitals, schools, retirement homes, and house after house after house.
The San Andreas cuts predominantly through remote areas, whereas the entire length of the Hayward Fault runs through densely populated cities such as
Oakland (pop. 406,000), Fremont (pop. 224,000) and Berkeley (pop. 116,000), and is not far from the metropolises of San Francisco (pop. 805,000) and San Jose (pop. 945,000). The U.S. Geological Survey (USGS) describes the
Hayward Fault as “the single most urbanized earthquake fault in the United States.”
地震百年不遇。放射性问题倒是每时每刻都在影响健康。
好心提醒，裤破涕落位于什么地方啊。就在山上断层开口的下游冲击扇上。好区啊无脑进。少废话，赶紧的。
fremont 有许多人是从cupertino 搬过去的
大伙赶紧无脑进。城乡结合部也好。否则锦衣夜行多没面子。
guadalupe 水系把含汞的矿渣冲到海湾，细菌作用下形成 methyl-mercury
并通过生物链影响整个湾区，Almaden是矿渣的源头。
但最大的问题并不是矿渣里的金属mercury残留
另外可以做颜料的原矿HgS其实没有毒。