RAPID: Sentinel-1 and ALOS-2 InSAR interferograms to support community modeling, mapping, and estimation of hazards from strike-slip and thrust fault interactions in Haiti.

RAPID：Sentinel-1 和 ALOS-2 InSAR 干涉图支持对海地走滑和逆冲断层相互作用造成的危害进行群落建模、测绘和估计。

• 批准号: 2150704
• 负责人: Jennifer Haase
• 金额: $ 3.16万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-15 至 2022-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2150704&HistoricalAwards=false
• 关键词: RAPID; Sentinel; ALOS; InSAR; interferograms

This RAPID project supports the analysis of satellite data following the August 14, 2021, Haiti earthquake (M=7.2) by combining Sentinel-1 and ALOS-2 InSAR observations. The analysis will allow preliminary interpretation of the interaction of strike-slip and thrust faults that rupture during the Haiti earthquake sequence. Systematic release of preliminary and refined images as each new satellite pass occurs (~5-7 days) and as the aftershock sequence and supporting field work takes place. InSAR, along with aftershock relocations, will be critical to help define the fault geometry necessary for understanding the rupture and subsequent stress changes on adjacent faults. Updated images will be released right after each acquisition (https://topex.ucsd.edu/haiti_7.2/). Early distribution of these data to local field scientists informs geologic mapping that will contribute to collecting ephemeral data on surface slip. Higher accuracy InSAR observations produced using the GMTSAR package, with stacking and noise reduction, combining data from Sentinel-1 and ALOS-2, are critical for future modeling efforts. The method increases the accuracy of InSAR line-of-sight (LoS) deformation maps while providing data products to help researchers identify ancillary fault structures with co- and post-seismic slip that will be constrained at large scale by available GPS data. The InSAR imagery can help resolve how significant the component of dip slip on the eastern segment of the Enriquillo Plantain Gardens Fault is and how its interaction with thrust faults is a major factor controlling this fault segmentation and thus impacts the seismic hazard in this trans-pressive boundary of the Caribbean plate. This project will support a female graduate student who will process the images weekly.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.

该快速项目通过结合Sentinel-1和ALOS-2 INS INAR观察结果，支持2021年8月14日，海地地震（M = 7.2）之后的卫星数据分析。 该分析将允许对在海地地震序列中破裂的流滑和推力断层的相互作用进行初步解释。 每次新卫星通行证（〜5-7天）以及余震序列和支撑现场工作发生时，系统释放初步图像和精制图像。 INSAR以及余震重新搬迁，对于确定理解破裂和随后的应力变化所必需的断层几何形状至关重要。每次获取后，更新的图像将立即发布（https://topex.ucsd.edu/haiti_7.2/）。这些数据向当地现场科学家的早期分布提供了地质映射，这将有助于收集表面滑动的短暂数据。使用GMTSAR软件包产生的更高精度的INS INS观察结果，堆叠和降噪，结合了Sentinel-1和Alos-2的数据，对于将来的建模工作至关重要。 该方法提高了INSAR视线线（LOS）变形图的准确性，同时提供数据产品以帮助研究人员识别具有共同和后震荡后的辅助断层结构，这将通过可用的GPS数据大规模限制。 INSAR图像可以帮助解决Enriquillo车车花园故障的东部部分的倾斜分量的重要性，以及其与推力断层的相互作用是控制这种断层分割的主要因素，从而影响了加勒比海板的这种透明度边界中的地震危险。 该项目将支持一名每周处理图像的女研究生。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评论标准来评估值得支持的。