Investigating the Magma System of the Active Rabaul Caldera

研究活跃的拉包尔火山口的岩浆系统

• 批准号: 12573005
• 负责人: MORI James Jiro
• 金额: $ 8.19万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12573005/
• 关键词: Rabaul Caldera; volcano, earthquake.; New Ireland; New Britain; Wetin fault; Radiated Energy; Earthquake Sources; Earthquake Moment; Weitin Fault; Weitin fault

The specific investigations of this project include a three-dimensional study of the P-wave velocity structure of Rabaul Caldera which identifies a large magma body in the under the central area of the caldera that is the likely source for the recent historic eruption. Using P arrival time data from both natural earthquakes and explosions from the Rabaul Earthquake Location and Caldera Structure (RELACS) experiment, we were able to image a low-velocity body in the body of the caldera that is the likely a large magma body (Tanimura and Mori).During the course of this study a great (Mw8.0) earthquake occurred on the transform fault east of Rabaul in the New Ireland area (Weitin-Kamdaru fault). The earthquake caused strong shaking in Rabaul and Kokopo, along with a 1 m tsunami in Rabaul Harbour. On New Ireland, which is very sparsely populated, there were observed surface offsets of the fault as large as 5.5 m. We wrote reports about the 2000 New Ireland Earthquake with a description of the earthquake (Itikarai) and a study of the earthquake source and subsequent triggering of two subsequent large earthquakes along the New Britain trench (Park and Mori).

对该项目的具体研究包括对Rabaul Caldera的P波速度结构的三维研究，该研究确定了Caldera中心区域以下一个大型岩浆体，这可能是最近历史喷发的来源。使用来自自然地震的到达时间数据以及拉巴尔地震位置和火山口结构（莱克斯）实验的爆炸，我们能够在火山口的体内形象一个低速体，这可能是一个大型岩浆体（tanimura and Mori）。 （Weitin-kamdaru故障）。地震引起了拉巴尔和科科波的强烈颤抖，以及拉巴尔港的1 m海啸。在人口稀疏的新爱尔兰，观察到的断层的表面偏移量高达5.5 m。我们撰写了有关2000年新爱尔兰地震的报道，并描述了地震（Itikarai），并研究了地震来源以及随后触发了新不列颠沟渠（Park and Mori）的随后发生的两次大地震。

项目成果

K.Sato,J.Mori: "Strong Motion Recordings in the Izu Islands, Japan : Observations of Earthquake Initiations"Eos, Transactions, American Geophysical Union. 81. F885 (2000)

K.Sato，J.Mori：“日本伊豆群岛的强震动记录：地震发生的观测”Eos，交易，美国地球物理联盟。

J.Mori,K.Sato,T.Shibutani: "Large Long-Period Earthquakes from Miyakejima Volcano Recorded at Kouzu Island"Eos, Transactions, American Geophysical Union. 81. F904 (2000)

J.Mori、K.Sato、T.Shibutani：“Kouzu 岛记录的三宅岛火山大长周期地震”Eos，交易，美国地球物理联盟。

Park Sun Cheon, Mori J. Jiro: "Possiblity of triggering mechanism in three major Papua New Guinea earthquake in 2000"Programme and Abstracts The seismological society of Japan. Fall Meeting. 120 (2002)

Park Sun Cheon、Mori J. Jiro：“2000 年巴布亚新几内亚三场大地震触发机制的可能性”计划和摘要 日本地震学会。

Takuya Tanimura, MORI James: "Seismic Tomographic imaging of the subsurface structure of Rabaul volcano"Japan Earth and Planetary Science Joint Meeting. S053-P019.

Takuy​​a Tanimura、MORI James：“拉包尔火山地下结构的地震层析成像”日本地球与行星科学联席会议。

Suncheon Park, James Mori: "Triggering of large earthquake in the 2000 New Ireland, Papua New Guinea sequence"IUGG2003. (発表予定).

Suncheon Park，James Mori：“引发 2000 年新爱尔兰、巴布亚新几内亚序列大地震”IUGG2003（待出版）。