Sismicidade na Região Noroeste do Ceará, NE do Brasil, em 2010

Structural framework of the Jaibaras Rift, Brazil, based on geophysical data

“…4d and 5d), which represent seismogenic zones (Oliveira et al, 2010;Moura, 2012;Moura et al, 2014). These features are also well observed on satellite images and in the topography.…”

“…The high values are consistent with its acid and potassium-rich nature (Dickson and Scott, 1997). A large number of earthquakes have been recorded in the Meruoca Granite area, between 2008 and 2010 (Oliveira et al, 2010;Moura, 2012;Moura et al, 2014). A more detailed geophysical/geological mapping was performed aiming at identifying areas more prone to earthquakes since percolation of fluids is expected to occur in faults and, hence, variation in the radionuclides contents.…”

“…Sykes (1978) and Boyce and Morris (2002) drew attention to the intraplate tectonics and revealed weakness zones in the continental crust, in rift basin regions with deep faults, as is also the case of the Jaibaras Basin that could be reactivated by stress generated at some distance from plate boundaries. Indeed, the geophysical data interpretation based on lineaments, geophysical fields, and modeling allowed identifying potential areas for the occurrence of earthquakes in the region (Oliveira et al, 2010;Moura, 2012;Moura et al, 2014).…”