Inverse Statistics Method: Spatial and Temporal Dependence in Earthquake

Document Type : Seismology and Engineering Seismology

Authors

1 International Institute of Earthquake Engineering and Seismology

2 Shahid Beheshti University

Abstract

The aim of this work is to understand the relation between time and place that an earthquake takes place. In order to answer this question, the Modified Level Crossing (MLC) technique has been implemented. By studying two earthquakes, one in Iran and one in California we came to the conclusion that there is a relation between time and place of an earthquake occurrence. As a matter of fact, this relation is quite decisive. By performing MLC analysis and comparing the two regions, we can state that geographical effects play an effective role due to geophysical differences between Iran and California. Indeed, by comparing the readings of Iran and California, one could come to understand the geophysical differences between the two domains.The so-called level crossing analysis has been used to investigate the spatial and temporal fluctuations of earthquake form time series. In this paper, we calculated the average frequency of up-crossing for original and shuffled data of Iran and California earthquakes in spatial and temporal series. This analysis showed a significant difference between the original data and shuffled data. By introducing the relative change of the total number of up-crossings for original data with respect to the so-called shuffled data, R, and calculate the Hurst exponent, Iran and California earthquakes are compared.

Keywords


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