Temporal variation in crustal structure derived from hybrid analysis of the seismic attenuation and anisotropy

• Project/Area Number: 21740328
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Nagoya University
• Principal Investigator: TADOKORO Keiichi 名古屋大学, 大学院・環境学研究科, 准教授 (70324390)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 観測手法 / 地震波の減衰 / 地震波異方性 / 地殻構造 / 群発地震 / 火山 / S波偏向異方性 / 地殻内流体 / 地震 / 偏向異方性

Research Abstract

We detected a crack structure with high crack density, whose direction is parallel to the epicenter alignment, in the region of the 2009 earthquake swarm at the Hakone volcano.Crustal fluid was included in the above crack structure during the earthquake swarm period. It was suggested that another crack structure was dominant during the period without earthquake swarm. This study presents that crustal structure possibly varies accompanied with occurrences of earthquake swarm.

Research Products

• [Journal Article] Spatial distribution of crack structure in the focal area of a volcanic earthquake swarm at the Hakone volcano, Japan (2011)
  • Author(s): Nihara, Y., Tadokoro, K., Y. Yukutake, R. Honda, and H. Ito
  • Journal Title: Earth Planet Space Volume: (印刷中)
  • NAID: 10031160556
  • Peer Reviewed
• [Presentation] 箱根火山における2009年の群発地震発生とクラック分布との関係 (2011)
  • Author(s): 丹原裕・田所敬一, 他3名
  • Organizer: 日本地震学会2011年秋季大会
  • Place of Presentation: 静岡
  • Year and Date: 2011-10-12
• [Presentation] 箱根火山の群発地震発生域におけるS波スプリッティング解析 (2011)
  • Author(s): 丹原裕・田所敬一
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 千葉
  • Year and Date: 2011-05-23
• [Presentation] 箱根火山の群発地震発生域におけるS波スプリッティング解析 (2011)
  • Author(s): 丹原裕・田所敬一
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 幕張
  • Year and Date: 2011-05-23
• [Presentation] 箱根火山における2009年の群発地震発生とクラック分布との関係 (2010)
  • Author(s): 丹原裕・田所敬一・行竹洋平・本多亮・伊東博
  • Organizer: 日本地震学会秋季大会
  • Place of Presentation: 静岡
  • Year and Date: 2010-10-12