Abstract
Declustering is a major step in any seismic hazard assessment approach and the choice of it controls the seismic activity estimation of the region. In this method, three different declustering methods are used for declustering the EQ catalogue collected around 500 km of Guwahati city. Completeness tests are performed on each of the declustered catalogue to find out the events which are complete with respect to magnitude and time. Further, complete catalogues are used to find out the Gutenberg–Richter (G–R) parameters from three different catalogues for the same seismotectonic province. Comparison is done on the basis of numbers of EQs in the declustered catalogues and on the basis of ‘a’ and ‘b’ parameters of the Gutenberg–Richter (G–R) recurrence law. Both ‘a’ and ‘b’ parameters are found varying based on the catalogues developed using each of the three methods clearly indicating that the choice of method may assign low to higher seismicity to the same region and same EQ catalogue.
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Borah, N., Kumar, A. (2021). Studying and Comparing the Declustered EQ Catalogue Obtained from Different Methods for Guwahati Region NE India. In: Latha Gali, M., Raghuveer Rao, P. (eds) Geohazards. Lecture Notes in Civil Engineering, vol 86. Springer, Singapore. https://doi.org/10.1007/978-981-15-6233-4_41
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