OFI SF5 Investigation of Seismicity Offshore Nova Scotia and Newfoundland

加拿大大西洋沿岸的地震活跃率相对较低，引起的关注比 北美洲的西海岸。然而，强烈地震，其复发时间不是 还没有量化，仍然可以发生在马里亚斯时代。例如，1929年的里氏7.2级大地震 班克斯地震引发了大规模的海底滑坡，引发了海啸 淹没了纽芬兰南部，造成28人死亡，并对沿海地区造成广泛破坏 新斯科舍省和纽芬兰的社区。最近的研究表明，大多数 历史上斯科特边缘的海底山体滑坡是由地震引发的。 然而，区域地震活动(图1)和断层结构仍然知之甚少。 记录在案，因为附近没有地震台站。该项目旨在检测和定位1-2 几个数量级的小地震，因此，第一次划定了地震断层 新斯科舍省和纽芬兰近海地区使用密集的临时地震台网(图2) 1)和最先进的地震检测和定位方法。SEED项目的重点是 综合考察了该地区的地震活动和断裂分布。这将会在 反过来，提高我们对近海新星地震和海啸风险评估的理解 斯科舍和纽芬兰及其对陆上的影响。

Seismicity rates offshore Atlantic Canada are relatively low and attract less attention than the west coast of North America. However, strong earthquakes, for which the recurrence time is not quantified yet, can still occur in the Maritimes. For example, the 1929 magnitude-7.2 "Grand Banks" earthquake generated a massive submarine landslide that triggered a tsunami that inundated southern Newfoundland, killing 28 and creating widespread damage to coastal communities of Nova Scotia and Newfoundland. Recent studies have suggested that most historical submarine landslides on the Scotian margin have been triggered by earthquakes. However, the regional seismicity (Fig. 1) and fault structures remain poorly understood and documented, due to the lack of nearby seismic stations. This project aims to detect and locate 1-2 orders of magnitude more small earthquakes and so, for the first time, delineate seismic fault zones offshore of Nova Scotia and Newfoundland using a dense temporary seismic network (Fig. 1) and state-of-the-art seismic detection and location methods. The Seed project is focused on comprehensive investigation of the seismicity and fault distribution in the region. This will in turn improve our understanding of seismic and tsunami hazard risk assessment for offshore Nova Scotia and Newfoundland and its onshore impact.