Almeida, I. M.

Borges, José Fernando

Carvalho, João P. G.

Costa, Paula Teves

Rodrigues, I.

Torres, Ricardo Jorge Gomes

Carvalho, João

Repositório do LNEG

Knowledge for the future - IAHS - IAPSO - IASPEI. IUGG Joint Assembly Gothenburg 2013http://iahs-iapso-iaspei2013.com/Abstracts.aspx?253143[30-10-2013 14:47:44]Back to start  |  Previous  |  To My meetingAbstract DetailsTitleVs30 estimation using ambient vibrations and seismic refraction experiments -Application to the lower Tagus Valley (Portugal) - 15:00SpeakerP. Teves-CostaSessionS201dPS - Site effectsAuthor(s)Teves-Costa, P. 1; Rodrigues, I. 1; Torres, R.J.G. 2; Carvalho, J. 3; Almeida, I.M. 1;Borges, J.F. 2 - 1 University of Lisbon, IDL - Instituto Dom Luiz & FCUL-DEGGE,Portugal; 2 University of Évora, CGE - Geophysical Centre & Physics Department,Portugal; 3 National Laboratory for Energy and Geology (LNEG), PortugalAbstract numberS201dPS.08AbstractThe town of Lisbon has been affected by several strong earthquakes in the pastoriginated either offshore or inland. The main inland seismogenic zone is the LowerTagus Valley (LTV) region oriented NNE-SSW and reaching the northern part of Lisbon atits southern end. It is composed by a system of faults mainly oriented according to thevalley trend, but the identification of the particular seismogenic structures able toproduce large earthquakes are still under debate. The strongest reported event was theJanuary 31st, 1531 earthquake (Mw = 7.0) that produced large damage in the southernpart of the valley, in particular in Lisbon. In recent years the seismic activity in the LTVis characterised by several small earthquakes. The last strong earthquake occurred onApril 23rd, 1909 (Mw = 6.1) and destroyed several small towns located in the valley.Due to the concentration of economic and industrial facilities and population density, thisregion presents high seismic risk in the Portuguese context. Besides, this region can bealso affected by large offshore earthquakes, as the 1755 earthquake which source islocated southern of Portugal mainland, in the Atlantic Ocean, about 250 km far fromLisbon.In order to estimate soil ground motion associated to different seismic sources, a map ofVs30 is need. We present here a methodology to estimate Vs30 based on ambientvibrations surveys (single-station and arrays measurements), seismic refractionexperiments and geologic and geotechnical information.This work was partially financed by the Portuguese project PTDC/CTE-GIX/102245/2008NEFITAG - Strong ground motion and near field effects in the Lower Tagus ValleyRegion, and the Spanish funded Complementary Action CGL2010-11831-E Identificacionde efectos de sitio en los registros de intensidad sismica en Iberia.HOMEANNOUNCEMENTSWELCOMEIAHS - IAPSO - IASPEICOMMITTEESIMPORTANT DATESACKNOWLEDGEMENTSSCIENTIFIC PROGRAMMEDOWNLOAD PROGRAMMEABSTRACTSPOSTER GUIDELINESBUSINESS MEETINGSGRANT APPLICATIONSAWARDS/HONOURSREGISTRATIONACCOMMODATIONSOCIAL PROGRAMMEFIELD TRIPSGENERAL INFORMATIONTRAVEL INFORMATIONSPONSORSHIP & EXHIBITIONEXHIBITION TECHNICAL MANUALLIST OF EXHIBITORSUSEFUL LINKSCONTACTCONGRESS APP

Vs30 estimation using ambient vibrations and seismic refraction experiments - Application to the lower Tagus Valley (Portugal)

http://repositorio.lneg.pt/bitstream/10400.9/2127/1/35917.pdf

Vs30 estimation using ambient vibrations and seismic refraction experiments - Application to the lower Tagus Valley (Portugal)

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