Self-affinities analysis of fault-related folding

Kazuhei Kikuchi, Kazutoshi Abiko, Hiroyuki Nagahama, Jun Muto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The Mid-Niigata Prefecture Earthquake did not rupture the earth's surface and occurred along a fault hidden well under folded terrain. In order to evaluate the seismic activity of such hidden earthquakes beneath fault-related folds, a new method to analyze self-affinities is introduced. Based on this analysis, the geometry of a fold is shown to be self-affine and can be variously scaled in different directions. The size and temporal properties, b-value in Gutenberg - Richter's law and p-value in the modified Omori's law, express aftershock activity. Then, from the analyzed data of the folds, we estimate the bvalue and p-value of the hidden earthquake under the fault-related folds. These estimated b-values and p-values are concordant with seismologically obtained ones in the aftershock sequence of the Mid-Niigata Prefecture Earthquake.

Original languageEnglish
Pages (from-to)308-311
Number of pages4
Issue number4
Publication statusPublished - 2014 Dec 1


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