Structure of the San Andreas Fault at SAFOD from P‐wave tomography and fault‐guided wave mapping
Structure of the San Andreas Fault at SAFOD from P‐wave tomography and fault‐guided wave mapping
复制标题
根据 P 波层析成像和断层导波测绘显示 SAFOD 的圣安德烈亚斯断层结构
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Lewis
中科院分区：
文献类型：
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作者：
P. Malin;E. Shalev;Heather Balven;C. Lewis
Fault‐guided waves reveal a low‐velocity fault segment a few hundred meters southwest of the main strand of the San Andreas Fault (SAF) system. In 2004, the San Andreas Fault Observatory at Depth (SAFOD) Main Hole was drilled 2.5 km underground and 0.7 km west of the SAF surface trace. A 3‐component, 4.5‐Hz seismograph was installed near the bottom of this hole. This instrument recorded fault zone guided (Fg) waves originating from earthquakes along the main SAF ∼2 km north and 3 km south of the SAFOD site. This ∼5 km length corresponds to a distinctive low‐velocity structure imaged in 2003 using microearthquakes recorded on the Pilot Hole array. Because this structure transmits Fg‐waves from the main fault, it is probably connected to the main SAF and is most likely a major, unmapped fault.
