2000年鳥取県西部地震 (<i>M</i>_J=7.3) に先行した震源分布のフラクタル次元の特徴的変化

• 村瀬 圭

  神奈川県温泉地学研究所

書誌事項

タイトル別名

• The Characteristic Changes in Fractal Dimension Preceding the 2000 Tottori-ken Seibu Earthquake (<i>M</i>_J=7.3)
• 2000年鳥取県西部地震(MJ=7.3)に先行した震源分布のフラクタル次元の特徴的変化
• 2000ネン トットリケン セイブ ジシン MJ 7 3 ニ センコウ シタ シンゲン ブンプ ノ フラクタルジゲン ノ トクチョウテキ ヘンカ

抄録

The author investigated fractal structure of hypocentral distributions before the 2000 Tottoriken Seibu earthquake (M_J=7.3), by estimating temporal changes in the spatial fractal dimension D of the hypocenter distributions, and comparing these results with the seismic activity in and around the focal region. The correlation integral method and the running time-window technique were applied to the D-value calculation for the JMA Earthquake Catalogue data during the period of January 1983 -February 2001. The results obtained are summarized as follows; (1) The D-value decreased drastically prior to the main shock in and around the focal region. The precursory durations are estimated as 1-3 years, which may be different with different sizes of the time-window. (2) The D-value decrease must be caused by hypocenter clusterings, or unusual seismic activity, which occurred over the wide area in and around the focal region. (3) Consequently, temporal variations in the D-values associated with a large earthquake may be effective as a precursor to the earthquake.

収録刊行物

• 地震　第２輯

  地震　第２輯 55 (1), 11-18, 2002

  公益社団法人 日本地震学会

キーワード

• fractal dimension
• precursory <i>D</i> decrease
• Tottori-ken Seibu earthquake
• hypocenter clustering
• seismic quiescence

詳細情報

• CRID: 1390282679282460544
• NII論文ID: 130006787766
• NII論文ID: 10009481654
• NII書誌ID: AN00305741
• DOI: 10.4294/zisin1948.55.1_11
• ISSN: 18839029
• ISSN: 2186599X
• ISSN: 00371114
• NDL書誌ID: 6561892
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6561892
• Web Site: https://www.jstage.jst.go.jp/article/zisin1948/55/1/55_1_11/_pdf
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