EPISODES platform documents: No conditions. Results ordered -Date Deposited. 2024-03-28T20:36:30ZEPrintshttps://episodesplatform.eu/images/sitelogo.pnghttps://episodesplatform.eu/eprints/2017-02-08T13:46:40Z2018-03-28T12:08:56Zhttp://episodesplatform.eu/eprints/id/eprint/1885This item is in the repository with the URL: http://episodesplatform.eu/eprints/id/eprint/18852017-02-08T13:46:40ZA Test for Non-Stationarity of Time-SeriesWe consider the problem of testing a given time-series for stationarity. The approach is based on evolutionary spectral analysis, and the proposed method consists essentially in testing the "homogeneity" of a set of evolutionary spectra evaluated at different instants of time. Using a logarithmic transformation, we show that the mechanics of the test are formally equivalent to a two-factor analysis of variance procedure when the residual variance is known, a priori. In addition to testing stationarity, the analysis provides also a method for testing whether the observed series fits a "uniformly modulated" model, and a test for "randomness" (constancy of spectra).M. B. PriestleyT. Subba Rao2017-02-08T13:11:38Z2018-03-28T12:08:11Zhttp://episodesplatform.eu/eprints/id/eprint/1884This item is in the repository with the URL: http://episodesplatform.eu/eprints/id/eprint/18842017-02-08T13:11:38ZIs the sequence of earthquakes in Southern California, with aftershocks removed, Poissonian?Yes.J.K. GardnerL. Knopoff2017-02-08T13:07:18Z2018-03-28T12:07:50Zhttp://episodesplatform.eu/eprints/id/eprint/1883This item is in the repository with the URL: http://episodesplatform.eu/eprints/id/eprint/18832017-02-08T13:07:18ZStochastic slip-predictable model for earthquake occurrencesA slip-predictable stochastic model is presented based on Markov renewal theory. Times between successive events are assumed to be Weibull-distributed with an increasing hazard rate. The model forecasts probabilities of earthquake occurrences conditional on the time of occurrence of the last event. The hazard along the Middle America Trench, Mexico, where data has suggested slip-predictable behavior, is obtained for illustrative purposes. Comparisons of this model with the Poisson model show that probability forecasts are underestimated with the Poisson model when there has been a seismic gap. The slip-predictable stochastic model presented in this paper represents a considerable improvement over the existing seismic hazard analysis methods. However, further testing of the model is necessary prior to wider application.Anne S. KiremidjianThalia Anagnos