Change point analysis on the Corinth Gulf (Greece) seismicity

R. Lykou, G. Tsaklidis and E. Papadimitriou

Physica A: Statistical Mechanics and its Applications, 2020, vol. 541, issue C

Abstract: Change point analysis is performed on the seismicity in Gulf of Corinth (Greece), an extensional graben which constitutes one of the most seismically active areas in Greece. Seismicity appears intense and strongly clustered and therefore analysis on mean and variance is appropriate. Sample autocorrelation function of the data is non-zero even for bigger lags, indicating long-range correlations. This phenomenon can be justified by possible changes in the mean of the observations. Non-parametric multiple change point analysis is applied to both the sequence of the earthquakes from a set of observations and its detrended data considering the earthquake occurrence frequency. The results of the analysis on the initial data set are compared to those of its detrended residuals. This procedure employs both online and offline methods providing different perspectives. Promising patterns are defined offline and most of them are detectable online.

Keywords: Change point analysis; Linear stochastic modelling; Seismicity; Gulf of Corinth (Greece) (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:541:y:2020:i:c:s0378437119320230

DOI: 10.1016/j.physa.2019.123630

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