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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Seismic characterization of the fall 2007 eruptive sequence at Bezymianny Volcano, Russia
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Seismic characterization of the fall 2007 eruptive sequence at Bezymianny Volcano, Russia

机译:俄罗斯Bezymianny火山2007年秋季喷发序列的地震特征

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摘要

We examine an eruptive sequence in late 2007 at Bezymianny Volcano to characterize the magmatic plumbing system and eruption-related seismicity. Earthquake locations reveal seismicity below and offset to the north of the volcano along a tectonic fault. Based on historical seismicity, the magma chamber is postulated to have a top at about 6 km depth. Minor dome explosions, large sub-plinian eruptions and dome collapses are analyzed using an automated event classification scheme. Low-frequency tremor, interpreted as gas escape, and low-frequency earthquakes are a dominant proportion of the energy released. We also examine multiplet earthquakes whose behavior during the study period changed significantly and systematically before the largest eruption, demonstrating the potential of tracking multiplets to assess changing conditions with the conduit.
机译:我们在2007年末检查了Bezymianny火山的喷发序列,以表征岩浆管道系统和与喷发有关的地震活动。地震的位置揭示了沿着构造断层在火山下方并向火山北部偏移的地震活动。根据历史地震活动,假定岩浆室的顶部约为6 km。使用自动事件分类方案,可以分析小型圆顶爆炸,大型亚平山爆发和圆顶塌陷。低频震颤(被解释为瓦斯逸出)和低频地震是释放出的能量的主要部分。我们还研究了多重地震,该地震在研究期间的行为在最大喷发之前已发生了明显而系统的变化,证明了跟踪多重信号以评估管道变化情况的潜力。

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  • 来源
    《Journal of Volcanology and Geothermal Research》 |2010年第4期|P.201-213|共13页
  • 作者单位

    Pacific Northwest Seismic Network, University of Washington, Johnson, Hall 070, Box 351310, Seattle, WA 98195, USA Geophysical Institute and Alaska Volcano Observatory, University of Alaska Fairbanks, 903 Koyukuk Dr. Fairbanks, AK 99775, USA;

    rnKamchatka Branch of Geophysical Services, Russian Academy of Sciences, Petropavlosk, Russia;

    rnCascade Volcano Observatory, United States Geological Survey, 1300 Cardinal Court, Vancouver, WA USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    bezymianny; earthquakes; conduit; magma chamber; multiplet;

    机译:疯狂的地震;导管;岩浆房;多重;

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