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Fractal dimension analysis for seismicity spatial and temporal distribution in the circum-Pacific seismic belt
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Fractal dimension analysis for seismicity spatial and temporal distribution in the circum-Pacific seismic belt
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Journal Article
Fractal dimension analysis for seismicity spatial and temporal distribution in the circum-Pacific seismic belt
2019
Overview
In this study, we present the fractal characteristics of the spatio-temporal sequence for seismic activity in the circum-Pacific seismic belt and vicinity regions, which is one of the most active seismic zones worldwide. We select the seismic dataset with magnitude
M
≥
4.4
in the circum-Pacific seismic belt region and its vicinity from 1900–2015 as the objects. Based on the methods of capacity dimension and information dimension, using
ln
(
1
/
δ
)
–
ln
N
(
δ
)
of the relationship to evaluate and explain, the results show that (1) in the circum-Pacific seismic belt and the surrounding areas, for the seismic activity with magnitude
M
≥
4.4
, the time series dimension is 0.63, the spatial distribution dimension is 0.52 and they have fractal structure. (2) For the earthquakes with
M
≥
7.0
, the time series dimension increases greatly, which indicates that the cluster characteristics in time is greatly reduced. And the earthquakes with magnitude
7.0
≥
M
≥
4.4
have significant impact on the characterized by clustering in time in the study region. (3) There is significant fractal structure at spatio-temporal distribution of earthquakes in the circum-Pacific seismic belt. It reveals the tectonic movements keep continuous, obvious anisotropism characteristic of geological structure and the distribution of surface stress field is spatio-temporal heterogeneity in the study area.
Publisher
Springer India,Springer Nature B.V
