Near-source observations and modeling of the Kuril Islands tsunamis of 15 November 2006 and 13 January 2007
Near-source observations and modeling of the Kuril Islands tsunamis of 15 November 2006 and 13 January 2007
复制标题
2006年11月15日和2007年1月13日千岛群岛海啸的近源观测和模拟
DOI：
10.5194/adgeo-14-105-2008
复制
发表时间：
2008
影响因子：
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通讯作者：
E. Kulikov
中科院分区：
文献类型：
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作者：
A. Rabinovich;L. Lobkovsky;I. Fine;R. Thomson;T. Ivelskaya;E. Kulikov
摘要。中千岛群岛附近的两次大地震（2006年11月15日的里氏8.3级和2007年1月13日的里氏8.1级）产生了横跨整个太平洋的跨海海啸。最强烈的振荡超过几米，发生在千岛群岛的震源区附近。对两次海啸的潮汐计记录进行了彻底的检查，并建立了事件的数值模型。2006年和2007年的地震海啸模型在模拟地震引发的海啸方面取得了两项重要进展：(a) Ji（2006, 2007）使用了有限失效震源模型，该模型提供了比传统震源区域空间位移模型更详细的信息，并避免了震源范围的不确定性；(b)利用三维拉普拉斯方程重建海啸初始海面高程（避免通常的浅水近似）。模拟结果与公海DART台站观测到的海啸波形非常吻合，证明了该方法的有效性。观测和模式结果表明，震源区海啸波的能量通量主要指向东南方向的夏威夷群岛，进入鄂霍次克海的能量传播相对较少。这两次海啸的一个显著特征是它们的高频内容，典型的波浪周期从2-3分钟到15-20分钟不等。尽管有某些相似之处，但这两次海啸在本质上是不同的，并且具有相反的极性：2006年11月的跨洋海啸的前浪是正的，而2007年1月的跨洋海啸的前浪是负的。两次海啸的数值模拟表明，由于震源性质不同，2006年的海啸比2007年的海啸传播范围更广，但集中程度更低。
Abstract. Two major earthquakes near the Central Kuril Islands (Mw=8.3 on 15 November 2006 and Mw=8.1 on 13 January 2007) generated trans-oceanic tsunamis recorded over the entire Pacific Ocean. The strongest oscillations, exceeding several meters, occurred near the source region of the Kuril Islands. Tide gauge records for both tsunamis have been thoroughly examined and numerical models of the events have been constructed. The models of the 2006 and 2007 events include two important advancements in the simulation of seismically generated tsunamis: (a) the use of the finite failure source models by Ji (2006, 2007) which provide more detailed information than conventional models on spatial displacements in the source areas and which avoid uncertainties in source extent; and (b) the use of the three-dimensional Laplace equation to reconstruct the initial tsunami sea surface elevation (avoiding the usual shallow-water approximation). The close agreement of our simulated results with the observed tsunami waveforms at the open-ocean DART stations support the validity of this approach. Observational and model findings reveal that energy fluxes of the tsunami waves from the source areas were mainly directed southeastward toward the Hawaiian Islands, with relatively little energy propagation into the Sea of Okhotsk. A marked feature of both tsunamis was their high-frequency content, with typical wave periods ranging from 2–3 to 15–20 min. Despite certain similarities, the two tsunamis were essentially different and had opposite polarity: the leading wave of the November 2006 trans-oceanic tsunami was positive, while that for the January 2007 trans-oceanic tsunami was negative. Numerical modeling of both tsunamis indicates that, due to differences in their seismic source properties, the 2006 tsunami was more wide-spread but less focused than the 2007 tsunami.
根据深海海啸波形估算的大地震滑移分布：2006年和2007年千岛地震
DOI：
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发表时间：
2016
期刊：
影响因子：
--
作者：
宝田美佳;郡山恵樹;森和俊;堀修;大矢裕一;大島堅一;鈴木淳史;藤井雄士郎・堂山俊貴・佐竹健治・綿田辰吾・楠本聡,
通讯作者：
藤井雄士郎・堂山俊貴・佐竹健治・綿田辰吾・楠本聡,