S‐wave velocity structure of Chlef City, Algeria, by inversion of Rayleigh wave ellipticity

Near Surface Geophysics - Tập 16 Số 3 - Trang 328-339 - 2018
Khalissa Layadi1, Fethi Semmane1, Laëtitia Le Pourhiet1
1Centre de Recherche en Astronomie Astrophysique et Géophysique (CRAAG) BP 63 Algiers 16340 Bouzareah

Tóm tắt

ABSTRACTChlef City, Algeria, which is located in the Lower Cheliff Basin, is vulnerable to seismic hazards. Since there is no constrained velocity model for the Lower Cheliff Basin, particularly at greater depths, we conducted an ambient vibration investigation to map the shear‐wave velocity structure beneath the city, with the primary goal of supplementing the existing microzonation studies. Here, we inverted the Rayleigh wave ellipticity measurement curve of ambient vibrations measurements from 120 sites in Chlef City to estimate the shear‐wave velocity structure. The study area was subdivided into six zones based on similarities between the observed horizontal‐to‐vertical spectral ratio of the ambient vibrations curves. Our resultant shear‐wave velocity models show that the observed fundamental frequencies (0.3–1.6 Hz) are related to a thick layer (~800 m) of upper Miocene deposits, where on average. Generally, the Mesozoic basement shows . Moreover, the clear peaks observed at higher frequencies and only in the northwest part of the city are related to a thin layer of Quaternary deposits ().

Từ khóa


Tài liệu tham khảo

10.1016/j.marpetgeo.2015.03.017

Arai H., 2000, Proceedings of the 12th World Conference on Earthquake Engineering, 1

10.1785/0120030028

10.1007/s10950-014-9464-x

10.1111/j.1365-246X.2008.04020.x

10.1111/j.1365-246X.2006.03154.x

Boore D.M., 2005, SMSIM—Fortran programs for simulating ground motions from earthquakes—A revision of OFR 96–80‐A, Open‐File Report 00‐509. United States Geological Survey, modified version, describing the program as of

10.1007/s10950-016-9564-x

10.1785/0120060245

10.1785/0120080179

10.1007/s00024-009-0474-5

10.1007/s12517-017-2869-4

10.1785/0220120176

Durville J.L., 1981, Aspect géotechniques du séisme du 10 Octobre 1980., Proceedings of des Journées Scientifiques sur le Séisme d'El Asnam

10.1046/j.0956-540x.2001.01406.x

10.1023/B:JOSE.0000005712.86058.42

Fäh D., 2009, Using ellipticity information for site characterization. NERIES deliverable JRA4 D4.

10.1016/j.cageo.2016.06.016

10.1016/j.cageo.2007.07.009

10.1029/2009GL038863

10.1093/gji/ggs005

10.1785/BSSA0890010250

10.1016/j.enggeo.2007.12.006

10.1785/0120150365

10.1016/0267-7261(94)90012-4

10.1111/j.1365-246X.2010.04560.x

10.1007/s10712-014-9305-z

10.1016/j.jappgeo.2011.11.005

10.1016/j.wavemoti.2003.12.015

Mattauer M., 1958, Etude géologique de l'Ouarsenis oriental, Algérie., Publication du Service de la Carte Géologique de l'Algérie

10.1016/j.soildyn.2015.06.006

Nogoshi M., 1970, On the propagation characteristics of microtremor., Journal of the Seismological Society of Japan, 23, 264

Nakamura Y., 1989, A method for dynamic characteristics estimation of subsurface using ambient noise on the ground surface., Quarterly Report of RTRI, 30, 25

Nakano K., 1984, Proceedings of the 8th World Conference on Earthquake Engineering, 767

Ouyed M., 1981, Etude séismotectonique., Proceedings of des Journées Scientifiques sur le Séisme d'El Asnam

10.1007/s10518-005-5758-2

10.1017/jog.2016.135

10.1016/j.soildyn.2016.10.016

RPA, 1999, Algerian seismic code, RPA99/2003, Ministry of Housing and Urban Planning, Algeria

10.1186/s40623-017-0667-6

10.1111/j.1365-246X.2011.05064.x

10.1046/j.1365-246X.2003.01856.x

10.1016/S1567-8032(11)08006-2

Congrès de Géologique International ‐ Alger 1952 Le bassin néogène du Chélif.

10.1007/s10518-011-9256-4

10.1016/j.soildyn.2007.11.005

Talaganov K., 1982, Institute of Earthquake Engineering and Engineering Seismology

10.1007/s12517-017-3074-1

10.1111/j.1365-246X.2012.05408.x

Ullah I., 2016, The analysis of H/V curve from different ellipticity retrieval technique for a single 3c‐station recording., Natural Hazards and Earth System Sciences

10.1016/j.soildyn.2017.01.015

Wathelet M., 2005, Array recordings of ambient vibrations: surface‐wave inversion. PhD thesis

10.1029/2008GL033256

Woodward Clyde Consultants (WCC), 1984, Seismic microzonation of Ech‐Chellif region, Algeria, Report prepared for Organisme de Contrôle Technique de la Construction (CTC), Algiers

10.1785/gssrl.73.5.628

Thông tin
Thông tin xuất bản

Near Surface Geophysics

Tập 16 Số 3

328-339

Thông tin tác giả