RAPID: Monitoring Postseismic Crustal Deformation in Haiti with TerraSAR-X Observations

2010年海地7.0级地震破裂了一条40公里长的断层，地震矩为5.44x1026达因厘米，并在海地首都太子港造成了毁灭性的破坏？S。7级地震通常会使S地壳位移3-5米，并使沿断层的大片区域的地壳变形。它还会引起较大的瞬时位移，称为震后变形。我们建议使用TerraSAR-X(TSX)数据来监测海地地震引起的震后形变。调查人员和他们的团队将在未来12个月内任务卫星获取恩里基洛断层破裂段的数据。震后变形是时间相关的。因此，在地震发生后立即获取数据非常重要。这项研究的结果将用于重新评估太子港地区在短期(余震)和长期(下一次大地震)地震活动中的地震危险性。拟议的研究将利用高分辨率的TSX数据和11天重复轨道来获得2010年海地地震后震后变形的详细时间序列。虽然X波段数据通常被认为不适合于地壳形变研究，但由于一致性的快速退化，重复时间短的连续采集将使我们能够在整个为期一年的采集计划中保持一致性。

The 2010 M=7.0 Haiti earthquake ruptured a 40 km long fault, had a seismicmoment of 5.44 x 1026 dyne cm, and caused a devastating destruction in the Haiti?s capital, Port-au-Prince. A magnitude 7 earthquake typically displaces the Earth?s crust by 3-5 meters and deforms the crust over a wide area along the fault. It also induces large transient displacements, termed postseismic deformation. We propose to monitor the posteseismic deformation induced by the Haiti earthquake using TerraSAR-X (TSX) data. The investigators and their team will task the satellite to acquire data in the next 12 months over the rupturedsegment of the Enriquillo Fault. The post-seismic deformation is time dependent. Thus it is important to acquire data right after the earthquake. The results of this study will be used to re-evaluate the seismic hazard of the Port-au-Prince area for both short-term (aftershocks) and long-term (next big earthquake) seismic activity.The proposed research will take advantage of the high resolution TSX data andthe 11-day repeat orbit to acquire detailed time series of postseismic deformation following the 2010 Haiti Earthquake. Although X-band data is often considered inappropriate for crustal deformations studies, due to the rapid coherence degradation, the successive acquisitions with short repeat time will allow us to maintain coherence throughout the yearlong acquisition plan.