1998
DOI: 10.1046/j.1365-246x.1998.00563.x
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Superposition of local and regional stresses in northeast Brazil: evidence from focal mechanisms around the Potiguar marginal basin

Abstract: One of the most important seismic areas in Brazil is the northeastern region with earthquake activity occurring mainly in the exposed Precambrian basement around the Potiguar Mesozoic marginal basin. Since 1986, temporary seismographic networks have been deployed at many sites near the border of the Potiguar basin and also further inland. This instrumental effort has allowed a better understanding of the seismicity patterns and crustal stresses in the region.  The seismicity in NE Brazil occurs mainly in swarm… Show more

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Cited by 145 publications
(139 citation statements)
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“…(Ferreira and Assumpção 1983). These events are felt over several hundred kilometers away from the epicenter (Ferreira et al 1998). Active faults in Borborema Province are usually strike-slip and generate events of up to 5.2 m b .…”
Section: Tectonic Features Of the Borborema Provincementioning
confidence: 99%
See 1 more Smart Citation
“…(Ferreira and Assumpção 1983). These events are felt over several hundred kilometers away from the epicenter (Ferreira et al 1998). Active faults in Borborema Province are usually strike-slip and generate events of up to 5.2 m b .…”
Section: Tectonic Features Of the Borborema Provincementioning
confidence: 99%
“…1), established at the end of the Neoproterozoic Brasiliano orogeny (Brito Neves et al 2000). By contrast, seismicity in the Palhano area cuts across the NE-trending Precambrian fabric (Ferreira et al 1998, Bezerra et al 2011). …”
Section: Introductionmentioning
confidence: 99%
“…Esta particularidade e a extensão de ambas as anomalias por toda a plataforma relacionam-se com a grande continuidade lateral do Lineamento Transbrasiliano, a qual foi truncada durante a separação entre América do Sul e 74 ESTRUTURAS RASAS NA MARGEM EQUATORIAL BRASILEIRÁ Africa, e que encontra como contraparte africana o Lineamento Kandi-4 • 30' (Trompette, 1994). A coincidência entre a anomalia de relevo positiva e a bacia cretácea foi interpretada por Silva Filho (2004) como uma inversão inicial da Sub-bacia Acaraú, relacionada a uma deformação transpressiva dextral nas falhas de trend NE-SW, resultado da compressão E-W a NW-SE que tem afetado a faixa litorânea dessa porção da margem equatorial (Assumpção, 1998;Ferreira et al, 1998), possivelmente desde o final do Terciário.…”
Section: Discussionunclassified
“…This is shown by stress data compilations (Assumpção 1998(Assumpção , 1992Ferreira et al 1998;Lima et al 1997); intraplate stress field numerical models (Coblentz and Richardson 1996;Meijer 1995) and space-based geodetic results (Lima 1999). All but one the available base lines from the French DORIS geodetic space-based system are shortening.…”
Section: Introductionmentioning
confidence: 91%