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Retrospective and forward prediction of next strong earthquakes in oceanic ridges and trenches using probabilistic models

Hammed, O.S. and Adagunodo, T. A. and Fagbemigun, Tokunbo Sanmi and Amosun, Joel Olayide and Awoyemi, M.O. and Sapele, F.O. (2020) Retrospective and forward prediction of next strong earthquakes in oceanic ridges and trenches using probabilistic models. Journal of Seismology.

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Abstract

Earthquake occurrence and recurrence depend on number of factors beyond mere observations. These include seismotectonic nature of the region, spreading rate of the ridge or subduction of plates causing the trench, active or otherwise nature of the fault on crust (on land), stress‐strain regime, and so on. In this work, the recurrence and expected times of next strong earthquakes (M ≥ 6) in the oceanic ridges and trenches were computed using gamma and lognormal probabilistic models. Summing the occurrence times of last strong earthquakes and these recurrence times, expected times of the next strong earthquakes were retrospectively and forwardly predicted. The expected times of the next strong earthquakes retrospectively predicted correlated with the recorded strong earthquakes in the earthquake catalog of the Advance National Seismic System (ANSS) hosted by the Northern California Earthquake Data Centre, USA, for the period of 1978–2017 in a readable format. The successful prediction of the expected times of the next strong earthquakes retrospectively is an indication that the expected times of the next strong earthquakes forwardly predicted in the regions of study will be positive. However, since the occurrence and recurrence of earthquakes depend on many factors, it is therefore important to note that it may not always be accurate to predict future earthquakes from retrospective perspective. Nonetheless, this work is a good effort, and it has thrown up some interesting results.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Patricia Nwokealisi
Date Deposited: 01 Dec 2020 15:36
Last Modified: 01 Dec 2020 15:36
URI: http://eprints.covenantuniversity.edu.ng/id/eprint/13765

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