Seismic crustal structure beneath the BC convergent margin

俯冲的海洋板块和上覆的大陆板块之间的界面目前被锁定并积累能量，这些能量将在未来类似于1700年9级地震的大地震中释放。然而，我们不知道地震是否会使海底破裂并导致海啸的产生。目前，在温哥华岛近海地区是否有任何小地震这样的基本信息还缺乏。这些信息对于向公众提供地震、海啸和海底滑坡危险的科学依据至关重要，并可能有助于防止潜在的生命损失。2010年夏天，我与加拿大地质调查局的研究人员和日本海洋地球科学技术机构（JAMSTEC）的地震学家合作，部署了33台JAMSTEC海底地震仪（OBS），为期3个月。此外，伍兹霍尔海洋研究所的10个宽带海洋观测系统（目前部署了1年）加上2个近实时海王星-加拿大宽带仪器构成了我们网格的一部分。该项目的第二阶段计划于2012年进行，将在一项重点更突出的研究中部署约35个日本OBS。我们预计，这些部署将使我们能够以前所未有的灵敏度探测地震。宽带仪器还将使我们能够记录“甚低频地震”，即通常与低振幅地震震颤相关的慢滑动事件。

The interface between the underthrust oceanic plate and over-riding continental plate is currently locked and accumulating energy which will be released in a future great earthquake similar to the magnitude 9 event in 1700. However, we do not know whether the earthquake will rupture the seafloor and contribute to tsunami generation. At present, there is a lack of information as basic as whether there are even any small earthquakes in the region offshore Vancouver Island. Such information is critical to provide the scientific basis for informing the public of earthquake, tsunami and seafloor-landslide hazards, and may help prevent the potential loss of life. In collaboration with researchers at the Geological Survey of Canada and seismologists at the Japan Agency for Marine-Earth Science & Technology (JAMSTEC), I deployed 33 ocean bottom seismometers (OBSs) from JAMSTEC for a 3-month period in summer 2010. As well, 10 broadband OBSs from Woods Hole Oceanographic Institution (currently deployed for 1-year period) plus 2 near-real-time NEPTUNE-Canada broadband instruments form part of our grid. Phase 2 of the project is planned in 2012, with ~35 Japanese OBSs to be deployed in a more focused study. We anticipate that these deployments will allow us to detect earthquakes at an unprecedented sensitivity. The broadband instruments will also allow us to record "Very Low Frequency Earthquakes", slow-slip events often associated with low-amplitude seismic tremor.