Abstract
The Eurasian seismic belt is the second largest seismic zone in the world. It has numerous seismic activities which have enormous impact on human’s life. It is of importance to study the spatio–temporal characteristics of the Eurasian seismic belt. As we can learn from previous studies, fractal and fractal dimension theories can be used to study seismic activities. In general, the temporal sequence and the spatio sequence of earthquakes both exhibit the fractal structures. When huge earthquakes occur, the fractal dimension of the temporal sequence is very low. As the days went by, the value of fractal dimension fluctuates. The seismic data from 1973 to 2014 in The Eurasian seismic belt are selected as the object of this study. Based on the single fractal model, the complex structure of the seismic spatio and temporal distribution in the seismic belt is quantitatively evaluated. Results show that over time the time interval of the seismic activity shortened, and the seismic activity on the Eurasian seismic belt has a nonlinear structure and self-similar characteristics. From the perspective of space, the fractal dimension of the Eurasian seismic belt tends to grow with time, and it also has a nonlinear structure and self-similar characteristics. When the temporal unit is set as 1 year, the accumulation and release of energy are probably periodic: the minor period might be about 8.5 years, and the major period might be about 13 years.
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Abbreviations
- G–R:
-
Gutenberg–Richter
- Ms:
-
Magnitude
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Funding
Supported by Fundamental Research Funds for the Central Universities (No. XDJK2019C091 and No. SWU117063). Sichuan Province Science and Technology Support Program (No. 2017HH0054 and 2018SZDZX0013 and 2019YJ0189).
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SL and XL: initiated the project and designed the experiments; XL, SL, YT and LY: performed the analysis and wrote the paper, who contributed equally to this work; XL, LY, YD, YF and YL: analyzed and processed the data; YT: read the reviewer’s comments and revised the original manuscript according to the suggestions received from the reviewers. All authors contributed to the interpretations and preparation of the final manuscript.
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The earthquake data were compiled by the U.S. Geological Survey (USGS) (https://earthquake.usgs.gov/earthquakes/).
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Tang, Y., Liu, S., Li, X. et al. Earthquakes spatio–temporal distribution and fractal analysis in the Eurasian seismic belt. Rend. Fis. Acc. Lincei 31, 203–209 (2020). https://doi.org/10.1007/s12210-020-00871-4
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DOI: https://doi.org/10.1007/s12210-020-00871-4