RAPID: Geotechnical Engineering and Geo-Sciences Response to the 6 February 2023 Turkiye Earthquake Sequence

RAPID：岩土工程和地球科学对 2023 年 2 月 6 日土耳其地震序列的响应

• 批准号: 2331127
• 负责人: Jonathan Stewart
• 金额: $ 8.82万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-06-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2331127&HistoricalAwards=false
• 关键词: RAPID; Geotechnical; Engineering; Geo; Sciences

The 6 February 2023 Türkiye Earthquake Sequence involved large-magnitude, strike-slip earthquakes along plate boundary faults. Similar strike-slip plate boundary faults exist in many other areas globally, including California. While the presence of the faults is known, much remains unknown about the effects of earthquakes on those faults, both in terms of the associated seismic hazards (levels of ground motion) and the impacts on people and infrastructure. As such, it is essential that the earthquake engineering and seismology communities learn from this devastating and seminal event. That learning began with a coordinated, multi-nation and multi-institution reconnaissance program jointly organized between the US and Turkey (Cetin et al. 2023, GEER Association Report 082). This Grant for Rapid Reponse Research (RAPID) project builds upon the reconnaissance work to investigate sites that are of special interest, developing the available data to the point that it can be used to advance seismological and engineering modeling, and thereby influence seismic risk reduction. This RAPID award supports researchers conducting targeted investigations at specific locations in the regions affected by two large earthquakes on 6 February 2023. The investigations include: (1) Documenting surface fault rupture by developing Structure from Motion (SfM) models of the full length of the rupture to supplement in-field evaluations at specific locations. (2) Fault trenching/dating near the southern end of the East Anatolian Fault (ruptured in 2023 event) as it transitions to the Dead Sea Fault (did not rupture) to understand how offsets between fault segments can arrest rupture and the “loading” of non-ruptured faults. (3) Characterizing ground motion station sites close to the ruptured fault using surface wave and seismic cone penetration testing, where such data is currently lacking. (4) Performing limited additional reconnaissance at targeted sites such as port facilities. The broader impact of this work is to inform recovery, inform our understanding of multi-fault rupture sequences with application in parts of the US, and populate databases used to build predictive models for surface fault rupture, ground motions, seismic dam performance, seismic lifelines performance, liquefaction triggering and deformations, and seismic foundation performance among others.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

2023年2月6日的<s:1>基耶地震序列涉及沿板块边界断层的大震级走滑地震。类似的走滑板块边界断层存在于全球许多其他地区，包括加州。虽然断层的存在是已知的，但地震对这些断层的影响仍然未知，无论是相关的地震危害（地面运动水平）还是对人员和基础设施的影响。因此，地震工程和地震学社区从这次破坏性和开创性的事件中学习是至关重要的。这种学习始于美国和土耳其联合组织的一个协调的、多国和多机构的侦察项目（Cetin等人，2023年，GEER协会报告082）。快速反应研究基金（Rapid）项目建立在侦察工作的基础上，对特别感兴趣的地点进行调查，将可用数据发展到可用于推进地震学和工程建模的程度，从而影响地震风险的降低。该RAPID奖支持研究人员在2023年2月6日受两次大地震影响的地区的特定地点进行有针对性的调查。研究包括：(1)通过建立断裂全长的运动构造（SfM）模型来记录地表断层破裂，以补充特定位置的现场评估。(2)在东安纳托利亚断层（在2023年事件中破裂）向死海断层（未破裂）过渡时，在其南端附近进行断层沟槽/定年，以了解断层段之间的偏移如何阻止破裂和未破裂断层的“加载”。(3)利用面波和地震锥贯入试验对目前缺乏的靠近破裂断层的地震动台站进行表征。(4)在港口设施等目标地点进行有限的额外侦察。这项工作的广泛影响是为恢复提供信息，为我们理解美国部分地区应用的多断层破裂序列提供信息，并填充数据库，用于建立地表断层破裂、地面运动、地震大坝性能、地震生命线性能、液化触发和变形以及地震基础性能等预测模型。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。