Preliminary Study of the Strong Ground Motions of the Tohoku, Japan, Earthquake of 11 March 2011: Assessing the Influence of Anelastic Attenuation and Rupture Directivity
Preliminary Study of the Strong Ground Motions of the Tohoku, Japan, Earthquake of 11 March 2011: Assessing the Influence of Anelastic Attenuation and Rupture Directivity
复制标题
2011 年 3 月 11 日日本东北地震强地震动的初步研究：评估滞弹性衰减和破裂方向性的影响
DOI：
10.1785/gssrl.83.1.119
复制
发表时间：
2012
影响因子：
3.3
通讯作者：
C. Papazachos
中科院分区：
文献类型：
--
作者：
A. Skarlatoudis;C. Papazachos
在线资料：VS 30值，各种距离估计的记录站，和拐角频率的低截滤波器应用于本研究的数据。
2011年3月11日，日本东北冲置太平洋沿岸发生了有史以来最大的地震（M9.0）。地震破裂了本州东北部近海的板间边界，几种地震破裂模型表明震中峰值位移可达30-40 m，持续时间约150 s。几个震源机制估计（例如，美国地质调查局的加权累积矩张量[WCMT]和板状几何形状; http：//earthquake.usgs.gov/earthquakes/eqinthenews/2011/usc0001xgp/finite_fault.php，最后一次访问于2011年8月）显示，逆冲断层走向为195°，倾角为110 °，破裂模型约为250 km × 150 km。
大日本地区的构造背景对应于太平洋板块俯冲到欧亚板块之下的俯冲区。一般而言，俯冲带的衰减受地幔楔的低速低Q物质控制，地幔楔将俯冲带划分为沿弧和弧后区域（例如，Ghofrani和Atkinson 2011; Skarlatoudis等人2011; Boore等人2009）。这种现象影响了日本的地面运动（例如，长谷川等人，1994年; Yoshimoto等人，2006年），东北冲地震也不例外，导致在更大的距离，主要是在弧后地区的地面运动水平较低。此外，这是一个特大逆冲事件的情况下，一个非常广泛的本地地震，强震，大地测量数据，这表明它可能是最好的地震记录在地震学的历史。在目前的工作中，我们研究的峰值和光谱特征的强震记录可从Kyoshin网络（K-NET; http：//www.k-net.bosai.go.jp/，最后访问2011年8月）。此外，我们执行…
Online material : Vs30 values, various distances estimated for recording stations, and corner frequencies of the low-cut filter applied to data for present study.
On 11 March 2011 a megathrust earthquake (M 9.0)—the largest recorded earthquake in the history of Japan—occurred off the Pacific coast of Tohoku-oki (Table 1). The earthquake ruptured the interplate boundary offshore of northeastern Honshu with several earthquake rupture models suggesting peak epicentral displacements up to 30–40 m and duration about 150 s. Several focal mechanism estimates ( e.g. , the weighted cumulative moment tensor [WCMT] with slab geometry from U.S. Geological Survey; http://earthquake.usgs.gov/earthquakes/eqinthenews/2011/usc0001xgp/finite_fault.php, last accessed August 2011) show a thrust fault striking at ∼195° and dipping at ∼10°, with a rupture model of about 250 km × 150 km.
The tectonic setting of the broader Japan area corresponds to a subduction area with the Pacific plate subducting beneath the Eurasian plate. In general, attenuation in subduction zones is controlled by the low-velocity low- Q material of the mantle wedge dividing the zone into along-arc and back-arc regions ( e.g. , Ghofrani and Atkinson 2011; Skarlatoudis et al. 2011; Boore et al. 2009). This phenomenon affects ground motions in Japan in general ( e.g. , Hasegawa et al. 1994; Yoshimoto et al. 2006) and the Tohoku-oki earthquake is no exception, resulting in lower levels of ground motions at larger distances, mainly in back-arc areas. Moreover, this is a case of a megathrust event for which an extremely extensive set of local seismic, strong motion, and geodetic data is available, suggesting it may be one of the best recorded earthquakes in the history of seismology. In the present work we examine the peak and spectral characteristics of the strong motion records available from the Kyoshin network (K-NET; http://www.k-net.bosai.go.jp/, last accessed August 2011). Furthermore, we perform …
影响因子：
3
作者：
K. Yoshimoto;U. Wegler;M. Korn
通讯作者：
K. Yoshimoto;U. Wegler;M. Korn
Takahashi,T.：“类病毒感染的叶组织的细胞病理学变化”
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--