Rescaled range analysis of microtremors in the Yun-Chia area, Taiwan

Young Fo Chang, Chien Chih Chen, Huey Chu Huang

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1 Scopus citations


Hurst's analysis of natural background microtremors at 10 stations in Yun-Li and Chia-Yi Counties, Taiwan, yields high values of H, ranging from 0.733 to 0.934. These values are found to be site-specific and stationary. Microtremors recorded in the foothills, on a hillside and at rock sites have higher H values than those on the alluvial plain, near the coast or at soil sites although they may very well be affected by the local environment and geology. Since low-frequency microtremors tend to be more persistent in time, we suggest that the high values of the Hurst exponent H may be causally correlated with the presence of low frequencies. This seems likely because Hurst exponents H > 0.5 mean a higher statistical persistence of a random signal.

Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalTerrestrial, Atmospheric and Oceanic Sciences
Issue number1
StatePublished - Mar 2006


  • Fractal dimension
  • Memory effect
  • Microtremor
  • Rescaled range


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