SEISMOLOGY AT SEISMOLOGY AT IAG-USP IAG-USP Inst. Astronomy, Geophysics & Atmospheric Sc Inst. Astronomy, Geophysics & Atmospheric Sc University of São Paulo University of São Paulo
Jan 11, 2016
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
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
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
Rio Claro, UNESP(RCLB)
Brasilia, UnB(BDFB)
São Paulo, USP
naturaldam-induced
Natal, UFRN.Univ. FederalRio Grande do Norte(RCBR)
Seismology Groups
IPT
- Support from Petrobrás/Eletronuclear
Risco Sísmico no SudesteRisco Sísmico no Sudeste
acel. 0,1g -> return period 50.000 yearsmapa sismotectônico
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
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)
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
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
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
)
high frequency (~5Hz) receiver functions in sedimentary basins
RZ
Inversão da Função do Receptor
basalto
arenitos
embasamento
Zevallos et al.(submitted 2005)
b
ae
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?