Abstract
The catalog of Kamchatka earthquakes is represented as a probability space of three objects {Ω, \( \tilde F \) P}. Each earthquake is treated as an outcome ω i in the space of elementary events Ω whose cardinality for the period under consideration is given by the number of events. In turn, ω i is characterized by a system of random variables, viz., energy class ki, latitude φ i , longitude λ i , and depth h i . The time of an outcome has been eliminated from this system in this study. The random variables make up subsets in the set \( \tilde F \) and are defined by multivariate distributions, either by the distribution function \( \tilde F \) (φ, λ, h, k) or by the probability density f(φ, λ, h, k) based on the earthquake catalog in hand. The probabilities P are treated in the frequency interpretation. Taking the example of a recurrence relation (RR) written down in the form of a power law for probability density f(k), where the initial value of the distribution function f(k 0) is the basic data [Bogdanov, 2006] rather than the seismic activity A 0, we proceed to show that for different intervals of coordinates and time the distribution f elim(k) of an earthquake catalog with the aftershocks eliminated is identical to the distribution f full(k), which corresponds to the full catalog. It follows from our calculations that f 0(k) takes on nearly identical numeral values for different initial values of energy class k 0 (8 ≤ k 0 ≤ 12) f(k 0). The difference decreases with an increasing number of events. We put forward the hypothesis that the values of f(k 0) tend to cluster around the value 2/3 as the number of events increases. The Kolmogorov test is used to test the hypothesis that statistical recurrence laws are consistent with the analytical form of the probabilistic RR based on a distribution function with the initial value f(k 0) = 2/3. We discuss statistical distributions of earthquake hypocenters over depth and the epicenters over various areas for several periods
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Original Russian Text © V.V. Bogdanov, A.V. Pavlov, A.L. Polyukhova, 2010, published in Vulkanologiya i Seismologiya, 2010, No. 6, pp. 52–64.
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Bogdanov, V.V., Pavlov, A.V. & Polyukhova, A.L. A probabilistic model of seismicity: Kamchatka earthquakes. J. Volcanolog. Seismol. 4, 412–422 (2010). https://doi.org/10.1134/S0742046310060059
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DOI: https://doi.org/10.1134/S0742046310060059