Tsunamis from the 29 March and 5 May 2015 Papua New Guinea earthquake doublet (Mw 7.5) and tsunamigenic potential of the New Britain trench
Tsunamis from the 29 March and 5 May 2015 Papua New Guinea earthquake doublet (Mw 7.5) and tsunamigenic potential of the New Britain trench
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DOI：
10.1002/2015gl064770
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发表时间：
2015-07
影响因子：
5.2
通讯作者：
M. Heidarzadeh;A. Gusman;T. Harada;K. Satake
中科院分区：
文献类型：
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作者：
M. Heidarzadeh;A. Gusman;T. Harada;K. Satake
我们分析了2015年3月29日和5月5日巴布亚新几内亚科科波7.5级双重地震的海啸特征。使用不同破裂速度（Vr）的远震体波反演显示出相似的源时函数和波形一致性，但滑动的空间分布不同。3月和5月的断裂持续时间分别为~45 s和~55 s，峰值分别为~25 s和~17 s。对于3月和5月的地震，海啸模拟倾向于采用Vr = 1.75和1.50 km/s的震源模型。断层上的最大滑动量相似（2.1 m和1.7 m），但不同深度和位置的最大海底隆升分别为~0.4 m和~0.2 m。新不列颠海沟假设的大地震（8.4级和8.5级）的海啸模拟表明，拉包尔的海啸振幅可能高达10米，但大部分海啸能量被限制在所罗门海内。
We characterized tsunamis from the 29 March and 5 May 2015 Kokopo, Papua New Guinea, Mw 7.5 earthquake doublet. Teleseismic body wave inversions using various rupture velocities (Vr) showed similar source‐time functions and waveform agreements, but the spatial distributions of the slips were different. The rupture durations were ~45 and ~55 s for the March and May events, with their peaks at ~25 and at ~17 s, respectively. Tsunami simulations favored source models with Vr = 1.75 and 1.50 km/s for the March and May earthquakes. The largest slip on the fault was similar (2.1 and 1.7 m), but the different depths and locations yielded maximum seafloor uplift of ~0.4 and ~0.2 m. Tsunami simulation from hypothetical great earthquakes (M 8.4 and 8.5) on the New Britain trench showed that tsunami amplitudes may reach up to 10 m in Rabaul, but most tsunami energy was confined within the Solomon Sea.