The Rupture Process of the 2018 M w 6.9 Hawaiʻi Earthquake as Imaged by a Genetic Algorithm‐Based Back‐Projection Technique
The Rupture Process of the 2018 M w 6.9 Hawaiʻi Earthquake as Imaged by a Genetic Algorithm‐Based Back‐Projection Technique
复制标题
基于遗传算法的反向投影技术对 2018 年夏威夷 6.9 级地震的破裂过程进行成像
DOI：
10.1029/2018gl080397
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发表时间：
2019
影响因子：
5.2
通讯作者：
Okubo, P. G.
中科院分区：
文献类型：
--
作者：
Kehoe, H. L.;Kiser, E. D.;Okubo, P. G.
2018 年 4 月，基拉韦厄火山爆发了一次骚乱，产生了大量火山喷发和高地震活动率，其中包括 2018 年 5 月 4 日发生的 Mw6.9 地震。在这项研究中，我们使用基于遗传算法的反投影技术对这次地震的破裂过程进行了成像。这次地震的主要特征是缓慢传播的西部破裂，与该地区1975年有记录的最大地震（Mw7.7）具有相似的特征。该西段的位置表明，滑脱的该部分上的小凹凸体经常因慢滑移事件而失效，当断层的相邻部分开始破裂时，可能会达到地震滑移率。考虑到该地区火山和地震活动之间的相互作用，对这些事件的破裂特性进行成像可以提高我们对该地区未来地质灾害的了解。
An episode of unrest began at Kīlauea in April 2018 that produced both significant volcanic output and high rates of seismicity, including aMw6.9 earthquake on 4 May 2018. In this study, we image the rupture process of this earthquake using a genetic algorithm‐based back‐projection technique. The dominant feature of the earthquake is a slowly propagating western rupture, which shares similar characteristics with the region's largest recorded event in 1975 (Mw7.7). The location of this western segment suggests that small asperities on this section of the décollement that frequently fail as slow slip events may achieve seismic slip rates when rupture is initiated on adjacent sections of the fault. Given the interaction between volcanic and seismic activity in this region, imaging the rupture properties of these events can improve our understanding of future geologic hazards in this region.