The Large Greenland Landslide of 2017: Was a Tsunami Warning Possible?
The Large Greenland Landslide of 2017: Was a Tsunami Warning Possible?
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DOI：
10.1785/0220170160
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发表时间：
2018-07-01
影响因子：
3.3
通讯作者：
Tsai, Yu-Lin
中科院分区：
文献类型：
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作者：
Chao, Wei-An;Wu, Tso-Ren;Tsai, Yu-Lin
山体滑坡、水下塌陷和岩石崩塌等大规模运动引发的海啸可能导致附近人口稠密地区严重被淹没。然而，由于缺乏对移动质量的及时估计，为山体滑坡提供操作预警变得特别困难。 2017年6月，格陵兰岛发生大规模山体滑坡，引发约1m高的海啸，影响了努加特西亚克小镇。我们展示了格陵兰冰盖监测网络（GLISN）实时地震记录的地震分析如何能够提供滑坡基本物理特性的估计，例如在起始时间后不久的崩塌质量和滑动速度。滑坡源参数的估计可用于海啸波模拟。我们展示了地震波形反演与前向海啸波模拟的实时集成如何能够在即将到来的海啸波到达 Nuugaatsiaq 村之前发出及时的操作警报（大约 10 分钟）。
Tsunamis generated by mass movements such as landslides, underwater slumps, and rock avalanches can lead to serious inundation of nearby populated areas. The lack of timely estimations of the moving mass volume, however, makes providing operational early warnings for landslides particularly challenging. In June 2017, a large landslide in Greenland generated tsunami waves of about 1 m high that impacted the small town of Nuugaatsiaq. We show how the seismic analysis of real-time seismic records from the Greenland Ice Sheet Monitoring Network (GLISN) can provide estimates of essential physical properties of the landslide such as collapse mass and sliding velocity shortly after origin time. The estimation of the landslide source parameters can be utilized for tsunami-wave simulations. We demonstrate how the real-time integration of seismic waveform inversion with forward tsunami-wave simulation could have enabled a timely operational warning (about 10 min) before the arrival of the impending tsunami waves at the village of Nuugaatsiaq.