Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1785/0120010221 |
Assessment of the site conditions of precariously balanced rocks in the Mojave Desert, southern California | |
Stirling, MW; Anooshehpoor, A; Brune, JN; Biasi, GP; Wesnousky, SG | |
通讯作者 | Stirling, MW |
来源期刊 | BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA |
ISSN | 0037-1106 |
出版年 | 2002 |
卷号 | 92期号:6页码:2139-2144 |
英文摘要 | We examine whether groups of precariously balanced rocks in the Mojave Desert, southern California, may have remained standing for thousands of years because anomalous site conditions prevent the rocks from toppling during large earthquakes. Measurements of peak ground velocity at bandwidths of 0.5-1, 1-2, 2-4, 4-8, and 8-16 Hz for 56 earthquakes (M-L 3.5-4.8) at two sites of precarious rocks are compared with velocities recorded for the same earthquakes by three TRI-NET* stations located on engineering "rock" (National Earthquake Hazard Reduction Program [NEHRP] site class B). We find that the residuals (the logarithm of the ratio of the, amplitudes recorded at the precarious-rock sites to the TRINET amplitudes for the same earthquake and epicentral distance) at frequencies less than about 4 Hz are negative (i.e., deamplification of 50%-250%), whereas the residuals are slightly positive at the higher frequencies (i.e., amplification of up to 25%-50%). High-frequency ground motions (e.g., peak ground acceleration) may therefore be slightly amplified at the precarious-rock sites, which means that site conditions do not appear to explain the existence of the precarious rocks in areas where high peak ground accelerations are predicted in recent probabilistic seismic-hazard (PSH) models. This discrepancy between the precarious rocks and the PSH models should be urgently resolved. |
类型 | Article |
语种 | 英语 |
国家 | New Zealand ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000179024900006 |
WOS类目 | Geochemistry & Geophysics |
WOS研究方向 | Geochemistry & Geophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/142261 |
作者单位 | (1)Inst Geol & Nucl Sci, Lower Hutt, New Zealand;(2)Univ Nevada, Nevada Seismol Lab, Reno, NV 89557 USA;(3)Univ Nevada, Ctr Neotecton Studies, Reno, NV 89557 USA |
推荐引用方式 GB/T 7714 | Stirling, MW,Anooshehpoor, A,Brune, JN,et al. Assessment of the site conditions of precariously balanced rocks in the Mojave Desert, southern California[J],2002,92(6):2139-2144. |
APA | Stirling, MW,Anooshehpoor, A,Brune, JN,Biasi, GP,&Wesnousky, SG.(2002).Assessment of the site conditions of precariously balanced rocks in the Mojave Desert, southern California.BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA,92(6),2139-2144. |
MLA | Stirling, MW,et al."Assessment of the site conditions of precariously balanced rocks in the Mojave Desert, southern California".BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA 92.6(2002):2139-2144. |
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