seismology at iag-usp
DESCRIPTION
SEISMOLOGY AT IAG-USP. IAG: Inst. Astronomy, Geophysics & Atmospheric Sciences USP: University of São Paulo. Main Research Areas. Brazilian seismicity:. Crustal and upper mantle structure. Natural and dam-induced Seismic risk - Crustal stresses. deep seismic refraction - PowerPoint PPT PresentationTRANSCRIPT
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SEISMOLOGY AT SEISMOLOGY AT IAG-USP IAG-USP
IAG: Inst. Astronomy, Geophysics & Atmospheric SciencesIAG: Inst. Astronomy, Geophysics & Atmospheric Sciences
USP: University of São PauloUSP: University of São Paulo
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Staff Academic: Jesus Berrocal Marcelo Assumpção Technicians: Luis Galhardo, Célia Fernandes, Denis Schramm José Roberto Barbosa Cleusa Barbosa Students: PhD: Marcelo Bianchi, Marcelo Rocha, Afonso Lopes MS: Thiago Costa, Marcelo Guarido PD: Fábio Perosi
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Main Research Areas
Brazilian Brazilian seismicity:seismicity:
Crustal and upper Crustal and upper mantle structuremantle structure
- Natural and dam-induced
- Seismic risk
- Crustal stresses
- deep seismic refraction
- receiver functions
- upper mantle tomography
Cooperation with Carnegie Institute, USGS-Menlo Park Northwestern University, Montpellier (France), Univ. S. Carolina, Barcelona, Potsdam
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Rio Claro, UNESP(RCLB)
Brasilia, UnB(BDFB)
São Paulo, USP
naturaldam-induced
Natal, UFRN.Univ. FederalRio Grande do Norte(RCBR)
Seismology Groups
IPT
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- Support from Petrobrás/Eletronuclear
Risco Sísmico no SudesteRisco Sísmico no Sudeste
acel. 0,1g -> return period 50.000 yearsmapa sismotectônico
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Crustal section in Tocantins foldbelt between Amazon and Sao Francisco cratons.
(Berrocal et al., 2004. Tectonophysics)
Crustal Seismic RefractionCrustal Seismic Refraction
arco magm. craton SF
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temporary BB temporary BB stations since 1992stations since 1992
7 STS-27 STS-25 Guralps (100s)5 Guralps (100s)
10 RT 72A10 RT 72A a few 130a few 130
Swiss Stations Swiss Stations (2002-2004)(2002-2004)
Present temporaryPresent temporarystationsstations
Tomografia (Feng et al.,2006)Tomografia (Feng et al.,2006)
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Upper Mantle P and S Tomography,Upper Mantle P and S Tomography,Central and SE Brazil.Central and SE Brazil.
Engdahl,Van der Hilst & Berrocal,GRL 1995.
Schimmel, Assumpção & VanDecar,JGR 2003
Nazca plate
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Upper Mantle Surface Wave TomographyUpper Mantle Surface Wave Tomography- cooperation with Suzan Van der Lee (Northwestern Univ.)
Vs, 100km depth
Phys. Earth Planet. Int. 2004; JGR 2006, submitted
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Crustal structure with Receiver FunctionsCrustal structure with Receiver Functions
On going projects in cooperation with Natal,Brasilia, Rio Claro, NWU, Univ. South Carolina,
esp
ess
ura
cru
sta
l (km
)
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high frequency (~5Hz) receiver functions in sedimentary basins
RZ
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Inversão da Função do Receptor
basalto
arenitos
embasamento
Zevallos et al.(submitted 2005)
b
ae
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1) Northern Paraná Basin :Basement topography and basin evolution.
(with S. Carolina Univ.)
2) Crustal and upper mantle structure.(with Natal, NWU, S. Carolina Univ, Barcelona)
Pool of 40 BB + 400 texans,to be funded by Petrobrás and used by Brazilian universities.
Future?