SEISMIC INTENSITIES OF EARTHQUAKES: FORMULATION OF SEISMIC SETTING IN BRAZIL
DOI:
https://doi.org/10.11606/issn.2316-9036.v0i91p90-103Keywords:
earthquakes, seismic scenarios, Brazil.Abstract
The level of seismic activity in Brazil is classified as low, and it has been calculated that the average recurrences are: less that 2 seismic events of over 4 mb magnitude every year, one seismic event of over 5.0 mb magnitude every six years, and one seismic event of 6.0 magnitude every 45 years. Despite the very low recurrence, seismic events of magnitudes up to 7.6 mb are possible, and in that case, their recurrence interval in Brazil is of around 885 years. In this work we will explore the elaboration of seismic scenarios, taking into account events with light magnitudes (m ≤ 5),moderate (5 < m ≤ 6) and strong (6 < m ≤ 7.5). To satisfy people’s curiosity and help them understand the extent of seismic events, we will also show seismic scenarios for events with extreme and improbable magnitudes (over 8 MW) in highly populated regions with a big number of important
buildings, such as dams, nuclear plants and big factories.
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