RAPID: Collaborative Research: Triggered Aftershocks and Tremors following the Kaikoura Earthquake recorded with Arrays (KEA)

该项目支持在新西兰库克海峡周围部署密集的地震台阵，以记录凯库拉7.8级地震后的深层构造震动和余震。这是自欧洲人在新西兰定居以来的第二大地震事件，它引发了沿着希库朗吉俯冲带的深、浅缓慢滑动事件。正在进行的慢滑活动明显增加了该地区发生8级大逆冲地震的可能性。因此，这个网络可以提供有用的信息，慢滑和震颤如何演变的大地震后的巨型逆冲断层。该项目涉及美国、新西兰和中国的国际合作，将支持加州大学滨江分校的一个初级教师。4个小型台阵（每个台阵有12个5-s柔性节点）连同17个短周期和宽带地震计将在库克海峡周围部署，为期一年。这一混合网络的战略规划是为了补充和利用该地区现有和计划的部署，以便能够获得该地区地震事件的高分辨率位置。在试验期间收集的地震数据将在试验结束后立即提供给IRIS DMC。收集的地震数据可用于了解M7.8凯库拉主震，持续的余震，触发慢滑事件和伴随的震颤活动之间的关系，并量化震颤和微震活动的物理机制。

This project supports the deployment a dense array of seismic arrays around the Cook Strait in New Zealand to record deep tectonic tremor and aftershocks following the M7.8 Kaikoura earthquake. This was the second largest seismic event since the European settlement in New Zealand, and it triggered deep and shallow slow-slip events along the Hikurangi subduction zone. The ongoing slow-slip events have apparently increased the probability of an M~8 megathrust earthquake in this region. Hence, this network can provide useful information on how slow-slip and tremor evolves on the megathrust following a large earthquake. This project involves international collaborations among United States, New Zealand and China, and will support a junior faculty at UC Riverside.Four mini-arrays (each has 12 5-s flex-nodes) together with 17 short-period and broadband seismometers, will be deployed around the Cook Strait for up to one year. This hybrid network is strategically planned to complement and take advantage of the existing and planned deployment in the area to be able to have high-resolution locations of seismic events in the region. Seismic data collected during this experiment will be made available to IRIS DMC as soon as the experiment is finished. The collected seismic data can be used to understand the relationship among the M7.8 Kaikoura mainshock, ongoing afterslip, triggered slow-slip events and the accompanying tremor activities, and quantify the physical mechanisms for tremor and microseismicity.