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DOI | 10.1029/2019GL085009 |
A Model Experiment of Fracture Induced Long-Period Events: Injection of Pressurized Gas Into a Viscoelastic Rock Analog | |
Namiki, Atsuko; Takahashi, Makoto; Tsutsui, Ryo | |
2019-11-12 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:21页码:11906-11914 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | Low-frequency events observed in volcanic areas preceding phreatic or phreatomagmatic eruptions may be excited by the injection of pressurized gas into damaged/heated rocks or solidifying magmas. To simulate this process, we conducted a series of gas injection experiments in gels as an analog of such soft rocks. When we inject the pressurized air into a quasi-Maxwell fluid with higher and lower shear moduli, cracks or a slug appears, respectively. The crack propagation velocity consists of the shear wave velocity of the gel. At the beginning of the crack generation, multiple cracks emerge, causing pulse-like low-frequency signals. In contrast, the slug grows faster than the shear wave velocity and excites high-frequency oscillation. These results show the possibility that the low-frequency seismicity observed in volcanic regions is the result of not only the resonance of a crack but also the crack propagation in soft rocks. |
英文关键词 | crack wave fracture LP rheology VLP |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000495882400001 |
WOS关键词 | ELASTIC PROPERTIES ; VOLCANIC TREMOR ; FLOW-THROUGH ; FLUID ; CRACK ; MECHANISM ; EARTHQUAKES ; INSTABILITY ; SIMULATION ; EXCITATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/224997 |
专题 | 环境与发展全球科技态势 |
作者单位 | Hiroshima Univ, Sch Integrated Arts & Sci, Hiroshima, Japan |
推荐引用方式 GB/T 7714 | Namiki, Atsuko,Takahashi, Makoto,Tsutsui, Ryo. A Model Experiment of Fracture Induced Long-Period Events: Injection of Pressurized Gas Into a Viscoelastic Rock Analog[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(21):11906-11914. |
APA | Namiki, Atsuko,Takahashi, Makoto,&Tsutsui, Ryo.(2019).A Model Experiment of Fracture Induced Long-Period Events: Injection of Pressurized Gas Into a Viscoelastic Rock Analog.GEOPHYSICAL RESEARCH LETTERS,46(21),11906-11914. |
MLA | Namiki, Atsuko,et al."A Model Experiment of Fracture Induced Long-Period Events: Injection of Pressurized Gas Into a Viscoelastic Rock Analog".GEOPHYSICAL RESEARCH LETTERS 46.21(2019):11906-11914. |
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