Improving the uncertainty of plate boundary processes using an integrated paleoseismology approach

使用综合古地震学方法改善板块边界过程的不确定性

• 批准号: RGPIN-2019-05641
• 负责人: Pilarczyk, Jessica
• 金额: $ 2.19万
• 依托单位: Simon Fraser University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=738422
• 关键词: Improving; uncertainty; plate; boundary; processes

Coastal hazards pose risk to many of the world's most populated centers. Lessons learned in the wake of recent earthquakes (2011 Tohoku) and tsunamis (2004 Indian Ocean) provide valuable insight into the intensity of events that can be expected in the future. However, long-term patterns of recurrence and intensity remain unclear as a result of the short (decadal to centennial long) instrumental record. Short-term records are not typically sufficient in capturing complete earthquake cycles and fall short of accurately identifying seismic risk. The motivation for the proposed research program is therefore to use paleoseismology (the study of past earthquakes and tsunamis preserved in the geologic record) to understand plate boundary processes that have occurred over the last centuries to millennia, and to use this new information to inform models that can be used to forecast the seismic risk to coastal communities. Over the next five years, the research program aims to: (1) investigate the link between strike-slip earthquakes and tsunami generation, and (2) assess the long-term patterns of slow slip events (SSEs) and their link to earthquake forecasting along subduction zones. A suite of field, laboratory, statistical, and modeling techniques will be used to achieve the objectives in a series of individual studies designed for graduate- and undergraduate-level research. This research capitalizes on expertise in paleoseismology, modeling, and chronology by drawing on established collaborations with government and academic institutions in New Zealand (e.g., GNS Science), Japan (e.g., Geological Survey of Japan), and Europe (e.g., Maynooth University). Individual studies involve fieldwork in Indonesia and New Zealand to collect new sedimentological information regarding past earthquakes and tsunamis. Collectively, these studies will enhance our ability to assess the risk of previously unconsidered tsunami sources, and improve our earthquake-forecasting ability along subduction zones. The improved understanding of plate boundary processes will have broad impact in the field of paleoseismology and will benefit hazard risk managers, city planners, and local governments.

沿海危害对世界上许多人口最多的中心构成风险。在最近的地震（2011年Tohoku）和海啸（2004年印度洋）（2004年印度洋）之后，汲取的教训提供了对未来可能预期的事件强度的宝贵见解。但是，由于短期（十年至百年长的）仪器记录，长期复发和强度的模式尚不清楚。短期记录通常不足以捕获完整的地震周期，并且没有准确识别地震风险。因此，拟议的研究计划的动机是使用古言学（对地质记录中保存的过去地震和海啸的研究）来了解过去几个世纪以来几个世纪以来发生的板界边界过程，并使用这些新信息来告知模型，这些模型可用于预测沿海社区的地震风险。在接下来的五年中，该研究计划的目的是：（1）研究滑雪地震与海啸产生之间的联系，以及（2）评估慢滑事件（SSES）的长期模式（SSES），以及它们与借助区域沿线预测的联系。一套现场，实验室，统计和建模技术将用于实现一系列专为研究生和本科研究的个人研究中的目标。这项研究通过与新西兰的政府和学术机构（例如GNS Science），日本（例如日本地质调查局）和欧洲（例如Maynnooth University）的政府和学术机构（例如GNS Science）（例如GNS Science）（例如GNS Science）（例如GNS Science）（例如GNS Science）（例如GNS Science）（例如GNS Science）（例如，Maynnooth University）合作，利用了古理学，建模和年表专业知识。个人研究涉及印度尼西亚和新西兰的实地研究，以收集有关过去地震和海啸的新沉积学信息。总的来说，这些研究将增强我们评估先前未经考虑的海啸来源的风险，并提高俯冲带沿俯冲区的地震重新估算能力的能力。对板块边界过程的理解的提高将在古言学领域产生广泛的影响，并将使危险风险管理者，城市规划师和地方政府受益。