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阵列，以记录7.8级凯库拉地震后的深部构造震动和余震。这是自欧洲人在新西兰定居以来发生的第二大地震事件，它引发了沿Hikurangi俯冲带的深浅慢滑事件。持续的慢滑事件明显增加了该地区发生M~8级大地震的可能性。因此，这个网络可以提供关于大地震后巨型逆冲带上的慢滑和颤动如何演变的有用信息。该项目涉及美国、新西兰和中国之间的国际合作，将支持加州大学河滨分校的一名初级教员。四个微型阵列(每个有12个5-S柔性节点)以及17个短周期和宽带地震仪将在库克海峡周围部署长达一年。这一混合网络的战略规划是为了补充和利用该地区现有的和计划中的部署，以便能够在该地区拥有高分辨率的地震事件地点。试验结束后，在试验期间收集的地震数据将立即提供给IRIS DMC。所收集的地震资料可以用来了解海库拉7.8级主震、正在进行的余滑、触发的慢滑事件和伴随的地震活动之间的关系，并量化地震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 member 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.