１９９５年奄美大島近海（喜界島近海）地震の地震活動とテクトニクス　遠地実体波による１９９５年奄美大島近海地震の震源過程

• 菊地 正幸

  東京大学地震研究所

書誌事項

タイトル別名

• the 1995 Amami-Oshima-Kinkai (Kikai-jima-Kinkai) Earthquake and Its Tectonics. Rupture Process of the 1995 Amami-Oshima-Kinkai Earthquakes Inferred from Teleseismic Data.
• エンチ ジッタイハ ニヨル 1995ネン アマミ オオシマ キンカイ ジシン

抄録

Several earthquakes, which occurred near Kikai-jima from October 18 to November 1, 1995, are examined by means of teleseismic body waves. All the focal mechanisms determined for these earthquakes reveal normal-faults having a down-dip extension within a subducting slab. The main source parameters of the largest event are : (strike, dip, rake) = (208°, 75°, -92°); the seismic moment=5.9×10¹⁹ [Nm] (M_w=7.1); fault area =6.0×10⁸ [m²];dislocation=1.5 [m]; rupture duration=23 [s]; stress drop =10 [MPa]. In this event the rupture propagated unilaterally to SW direction. The second largest event ruptured the NE region, where the fault plane did not smoothly connected but formed a step to the main fault plane. It may be noteworthy that these earthquakes did not trigger any significant inter-plate earthquakes, suggesting that the adjacent plate interface may be intrinsically aseismic.

収録刊行物

• 地学雑誌

  地学雑誌 106 (4), 537-545, 1997

  公益社団法人 東京地学協会

キーワード

• 震源過程
• 震源パラメタ
• プレート内部地震
• 遠地実体波

詳細情報

• CRID: 1390282679206492672
• NII論文ID: 10002236284
• NII書誌ID: AN00322536
• DOI: 10.5026/jgeography.106.4_537
• ISSN: 18840884
• ISSN: 0022135X
• NDL書誌ID: 4283310
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4283310
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可