Scaling relations of seismic moment, rupture area, average slip, and asperity size for M~9 subduction-zone earthquakes
Scaling relations of seismic moment, rupture area, average slip, and asperity size for M~9 subduction-zone earthquakes
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M~9俯冲带地震地震矩、破裂面积、平均滑移和凹凸尺寸的标度关系
DOI：
10.1002/grl.50976
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
and Y. Fujii
中科院分区：
文献类型：
--
作者：
Murotani;S.;K. Satake;and Y. Fujii
得到了大、中、巨型（Mw= 6.7-9.2）俯冲带地震的地震矩m0、破裂面积、平均滑移pd和粗糙度大小的标度关系。本文编制了全球7次特大地震（Mw~9）的震源参数，利用海啸和大地测量资料估算了这些地震的非均匀滑动分布。我们定义了滑移大于1.5倍的次级断层。利用日本周边10次大地震的25个滑动模型，重新计算了32个滑动模型的回归关系：S= 1.34 × 10−10M02/3，D= 1.66 × 10−7M01/3,Sa= 2.81 × 10−11M02/3, Sa/S= 0.2，其中esandsaare（平方公里），M0is（牛顿米），dis（米）。这些标度关系与Murotani et al.（2008）在大地震和强震中得到的标度关系非常相似。因此，这两种尺度关系都可以用于未来与大地震相关的海啸危害评估。
Scaling relations for seismic momentM0, rupture areaS, average slipD, and asperity sizeSawere obtained for large, great, and giant (Mw= 6.7–9.2) subduction‐zone earthquakes. We compiled the source parameters for seven giant (Mw~9) earthquakes globally for which the heterogeneous slip distributions were estimated from tsunami and geodetic data. We definedSafor subfaults exhibiting slip greater than 1.5 timesD. Adding 25 slip models of 10 great earthquakes around Japan, we recalculated regression relations for 32 slip models:S= 1.34 × 10−10M02/3,D= 1.66 × 10−7M01/3,Sa= 2.81 × 10−11M02/3, andSa/S= 0.2, whereSandSaare in square kilometers,M0is in newton meters, andDis in meters. These scaling relations are very similar to those obtained by Murotani et al. (2008) for large and great earthquakes. Thus, both scaling relations can be used for future tsunami hazard assessment associated with a giant earthquake.