TITLE:
Local Magnitude Study of the Seismic Activity on Itacarambi, MG
AUTHORS:
Ítalo Lopes de Oliveira, George Sand França, Cristiano Naibert Chimpliganond
KEYWORDS:
Intraplate Earthquakes; Local Magnitude; Duration of Seismic Signal; Parameter b
JOURNAL NAME:
International Journal of Geosciences,
Vol.3 No.1,
February
28,
2012
ABSTRACT: The importance of studying the local magnitude related to seismic activity occurred recently in the region of Itacarambi, state of Minas Gerais, is due to the fact that these were earthquakes of intraplate origin. From the study of [1] and the relation between local magnitude and seismic signal duration, was performed a data analysis obtained in the same region, on the period between October/2007 and June/2008, in which we can estimate the equation
MD = 2.153 (±0.072) LogD – 1.925 (±0.132) to calculate the magnitude of local duration. We can also estimate one value for the b parameter using the equation LogN = a – bMD from a frequency-magnitude study. It was found the value of b = 0.826 (±0.020) for the general activity of Itacarambi, MG, that is within the universal range proposed by [2].