新疆天山地区b值时空变化特征

Abstract

Abstract: We obtained anomaly index of b-value in the central and eastern Tianshan, the western section of southern Tianshan of Xinjiang through the analysis of space-time scanned images for b-value based on the lower limit of minimum Mc from 2000. The results show that (1) The background value of b-value in central and eastern Tianshan is 0.705 ± 0.004, and that for the western part of southern Tianshan is 0.583 ± 0.003, which is slightly below the background level of b-value in central and eastern Tianshan. (2) The b-values for the epicenter of the four earthquakes with magnitude above 6 in 2003~2012 are principally in a low level before the earthquakes, but those of the region around the epicenter are relatively high, which reflect the main direction of stress accumulation changes.

Key words: Variation of b-value, Central and eastern Tianshan, Western part of southern Tianshan

CLC Number:

P315.7

ZHANG Lin-lin, TANG Lan-lan. Temporal and Spatial Variations of b-value in Tianshan, Xinjiang[J]. EARTHQUAKE, 2015, 35(3): 93-101.

References

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Temporal and Spatial Variations of b-value in Tianshan, Xinjiang

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