Log-periodic modulation to power law of change in the geoelectric potential difference observed on Niijima Island prior to volcanic and seismic activation in the Izu island region, Japan 2000

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概要

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• Anomalous changes in the geoelectric potential difference between electrodes on Niijima Island first appeared at the end of April 2000 about two months before the onset of a major volcanic and seismic activity in the Izu island region. They ceased at the end of August 2000 simultaneously with the decline of the volcanic and seismic activity. The temporal change in the magnitude of 0.01Hz Fourier coefficient of the geoelectric potential difference was analyzed on the basis of a critical"time-to-failure"model. It was found that the temporal change was well explained by a power-law decorated with a log-periodic oscillation. This indicates that the possible generation mechanism of the electric potential changes was related to a critical phenomenon. Several possible mechanisms that may cause this phenomenon are suggested.

• 日本学士院の論文

著者

• TANAKA Haruo

  Earthquake Prediction Center, Tokai University

• TANAKA Haruo

  Earthquake Prediction Research Center, Tokai University

関連論文

• A plausible universal behaviour of earthquakes in the natural time-domain
• Log-periodic modulation to power law of change in the geoelectric potential difference observed on Niijima Island prior to volcanic and seismic activation in the Izu island region, Japan 2000

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