DOI: 10.1002/2015GL066443
论文题名: Sudden changes in the amplitude-frequency distribution of long-period tremors at Aso volcano, southwest Japan
作者: Sandanbata O. ; Obara K. ; Maeda T. ; Takagi R. ; Satake K.
刊名: Geophysical Research Letters
ISSN: 0094-8365
EISSN: 1944-8096
出版年: 2015
卷: 42, 期: 23 起始页码: 10256
结束页码: 10262
语种: 英语
英文关键词: amplitude-frequency
; phreatic eruption
; scaling
; Strombolian eruption
; volcanic tremor
Scopus关键词: Earth sciences
; Geophysics
; Amplitude frequency
; Phreatic
; Scaling
; Strombolian eruption
; Volcanic tremor
; Volcanoes
; amplitude
; explosive volcanism
; microtremor
; power law distribution
; volcanic eruption
; Aso Volcano
; Japan
; Kumamoto
; Kyushu
英文摘要: We observed the activity of long-period tremors (LPTs) with a period of ∼15 s at Aso volcano, Japan, during a 3 year period including the 2014 eruptions. The number of LPTs detected systematically increased 3 months before the Strombolian eruptions. LPT activity can be divided into five stages based on rapid changes in the maximum LPT amplitude. The amplitude-frequency relation follows an exponential distribution during each stage before the Strombolian eruptions, with different characteristic amplitudes for each stage, indicating that the scale of the source property changed in stages. However, during a stage that persisted for 6 days after the onset of Strombolian activity, the amplitude-frequency relation temporarily followed a power law distribution, indicating that the LPT source process no longer had a characteristic scale. In the last stage, the amplitude-frequency relation returned to an exponential distribution. We therefore conclude that the physical source of volcanic LPTs changed during the eruption period. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953639474&doi=10.1002%2f2015GL066443&partnerID=40&md5=9643a22eea73509312e22f3e6ce67198
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7981
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Earthquake Research Institute, University of Tokyo, Tokyo, Japan
Recommended Citation:
Sandanbata O.,Obara K.,Maeda T.,et al. Sudden changes in the amplitude-frequency distribution of long-period tremors at Aso volcano, southwest Japan[J]. Geophysical Research Letters,2015-01-01,42(23).