On 14 August 2021, a large earthquake struck the southern region of Haiti. The epicenter of this earthquake is located relatively close to the Enriquillo–Plantain Garden Fault (EPGF) zone, a major active fault with a strike-slip mechanism in the southern part of Hispaniola. Since the epicenter of this earthquake is located relatively close to the Enriquillo–Plantain Garden Fault zone, one might think that the EPGF is the causative fault. Using a Bayesian approach, the Sentinel-1 data is then utilized to investigate the seismogenic fault responsible for the 2021 Haiti earthquake. The Bayesian inversion indicated that the mainshock ruptured a north-dipping fault with a strike and a dip of 270.9° and 69.2°, respectively, and buried at a depth of 10.3 km from the earth’s surface. The preferred slip model showed that the rupture did not reach the surface and was confined at a depth of ∼6 km to ∼32 km. The preferred fault geometry is in good agreement with the relocated aftershock distribution and is inconsistent with the EPGF system configuration. It indicates that the EPGF is probably not the seismogenic fault responsible for the 2021 Haiti earthquake. Instead, results suggested that the 2021 Haiti earthquake ruptured an unmapped blind fault.

2021年8月14日，海地南部地区发生大地震。此次地震的震中相对靠近恩里基洛-车前草花园断层（EPGF）带，该断层是伊斯帕尼奥拉岛南部具有走滑机制的主要活动断层。由于这次地震的震中相对靠近恩里基洛-大蕉花园断层带，人们可能会认为EPGF是震源断层。然后使用贝叶斯方法，利用 Sentinel-1 数据来调查导致 2021 年海地地震的发震断层。贝叶斯反演表明，主震破裂了一条走向和倾角分别为270.9°和69.2°的北倾断层，埋藏深度为距地表10.3公里。首选的滑移模型表明破裂并未到达地表，并且仅限于～6 km 至～32 km 的深度。首选断层几何形状与重新定位的余震分布非常吻合，但与 EPGF 系统配置不一致。这表明 EPGF 很可能不是导致 2021 年海地地震的发震断层。相反，结果表明 2021 年海地地震导致了未绘制地图的盲断层破裂。