DOI: 10.1007/s00531-015-1147-5
Scopus记录号: 2-s2.0-84940954063
论文题名: Downhole geophysical observatories: best installation practices and a case history from Turkey
作者: Prevedel B. ; Bulut F. ; Bohnhoff M. ; Raub C. ; Kartal R.F. ; Alver F. ; Malin P.E.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2015
卷: 104, 期: 6 起始页码: 1537
结束页码: 1547
语种: 英语
英文关键词: Downhole observatory
; Earthquake research
; Fault system
; North Anatolian Fault Zone
; Permanent monitoring
; Seismometer
Scopus关键词: earthquake hypocenter
; earthquake mechanism
; fault zone
; microearthquake
; North Anatolian Fault
; piezometer
; seismic noise
; seismograph
; Sea of Marmara
; Turkey
英文摘要: Downhole sensors of different types and in various environments provide substantial benefit to signal quality. They also add the depth dimension to measurements performed at the Earths’ surface. Sensor types that particularly benefit from downhole installation due to the absence of near-surface noise include piezometers, seismometers, strainmeters, thermometers, and tiltmeters. Likewise, geochemical and environmental measurements in a borehole help eliminate near-surface weathering and cultural effects. Installations from a few hundred meter deep to a few kilometer deep dramatically reduce surface noise levels—the latter noticeably also reduces the hypocentral distance for shallow microearthquakes. The laying out of a borehole network is always a compromise of local boundary conditions and the involved drilling costs. The installation depth and procedure for a long-term downhole observatory can range from time limited installations, with a retrieval option, to permanently cemented sensors. Permanently cemented sensors have proven to be long-term stable with non-deteriorating coupling and borehole integrity. However, each type needs to be carefully selected and planned according to the research aims. A convenient case study is provided by a new installation of downhole seismometers along the shoreline of the eastern Marmara Sea in Turkey. These stations are being integrated into the regional net for monitoring the North Anatolian Fault Zone. Here we discuss its design, installation, and first results. We conclude that, despite the logistical challenges and installation costs, the superior quality of downhole data puts this technique at the forefront of applied and fundamental research. © 2015, The Author(s). URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940954063&doi=10.1007%2fs00531-015-1147-5&partnerID=40&md5=f3429336fb115bd9d5a14f7e0d10c2d3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70268
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Helmholtz-Centre Potsdam GFZ German Centre for Geosciences, Telegrafenberg, Potsdam, Germany; Department of Earth Sciences, Free University Berlin, Malteser Strasse 74-100, Berlin, Germany; AFAD, Disaster and Emergency Management Presidency, Ankara, Turkey; IESE, University of Aukland, Aukland, New Zealand; TÜBITAK Marmara Research Center, Gebze, Turkey
Recommended Citation:
Prevedel B.,Bulut F.,Bohnhoff M.,et al. Downhole geophysical observatories: best installation practices and a case history from Turkey[J]. International Journal of Earth Sciences,2015-01-01,104(6)