Seismicity on the border of Parecis Phanerozoic basin, Mato Grosso State, Brazil


Primeiro Autor: 
Lucas Vieira Barros
Ano de Publicação: 
Nome da Revista/Jornal: 
16º International Congress of the Brazilian Geophysical Society & Expogef. Rio de Janeiro, 19-22 August. Expanded Abstract 16th International Congress of the Brazilian Geophysical Society.
Tipo de publicação: 
Artigo publicado em Congresso
Publicação Nacional
TítuloSeismicity on the border of Parecis Phanerozoic basin, Mato Grosso State, Brazil
Tipo da publicaçãoConference Paper
Ano de Publicação2019
AutoresBarros L, Assumpção M, França G, Carvalho J, Neri B, Araujo E, Szczpanski F
Conference NameInternational Congress of the Brazilian Geophysical Society&ExpogefProceedings of the 16th International Congress of the Brazilian Geophysical Society&Expogef
EditoraBrazilian Geophysical Society
Accession Number1
Call Number1
Other Numbers6
Palavras-ChaveParecis Phanerozoic basin

The biggest earthquake ever observed in all Stable
Continental Interior (SCI) of the South American plate
occurred in Serra do Tombador (ST), Mato Grosso State, in
1955. 100km to northeast of ST, in Porto dos Gaúchos (PG),
a recurrent seismicity has been observed since 1959 and
earthquakes continues to be detected in this area up today.
Two magnitudes 5 earthquakes occurred in 1998 and 2005
with intensities up to VI and V, respectively. Recently, on
January 26 of 2015 it was detected, 17km away from the PG
seismic zone, another seismic activity with a main shock of
magnitude 4.0mb. This new seismic area, is parallel to PG
fault, with similar Focal Mechanism to the 1998 and 2005
seismic sequences. The seismicity in these three seismic
areas did not present any relation with geological structures
presents in this region. However, in light of new studies on
Intraplate seismicity, it seems that these seismicities are
interconnected: Serra do Tombador earthquake of 1955
Triggered Porto dos Gaúchos (PG) earthquakes and PG
earthquakes Triggered the seismicity that has being
observed in the new seismic zone since January 2015. This
work aims to present results of studies that has been made
about this new seismic zone, but before that, we will do a
revision on the studies made about the seismicity in ST and
PG seismic zones.

Barros, L.V., Assumpção. M., França, G.S., Carvalho, J., Neri, B.L., Araújo, E.L., Szczpanski, F.M..pdf694.62 KB