The structural complexity of active faults and the stress release history along the fault system may exert control on the locus and extent of individual earthquake ruptures. Fault bends, in particular, are often invoked as a possible mechanism for terminating earthquake ruptures. However, there are few records available to examine how these factors may influence the along‐fault recurrence of earthquakes. We present a new paleoearthquake chronology for the southern San Andreas fault at Elizabeth Lake and integrate this record with existing paleoearthquake records to examine how the timing and frequency of earthquakes vary through a major restraining bend. This restraining bend features a mature, throughgoing right‐lateral strike‐slip fault, two major fault intersections, proposed subsurface fault dip changes, and a >200 km long section of fault misaligned with the regional plate motion. The Frazier Mountain, Elizabeth Lake, Pallett Creek, Wrightwood, and Pitman Canyon paleoseismic sites are located on this relatively linear surface trace of the San Andreas fault between fault bends. Our paleoseismic investigations at Elizabeth Lake document 4–5 earthquakes, since ∼1100 C.E.⁠, similar to the number of earthquakes recorded at Pallett Creek. In contrast, the Frazier Mountain and Wrightwood sites each record 8–9 earthquakes during this same time period. Differences in earthquake frequency demonstrate that fewer earthquakes rupture the central portion of the restraining bend than occur near the fault bends and intersections. Furthermore, the similarity of earthquake records from the Bidart Fan paleoseismic site northwest of the restraining bend and the Frazier Mountain paleoseismic site suggests that the broad, 30° curve of the Big Bend section of the San Andreas fault exerts less influence on fault rupture behavior than the 3D geometry of the Mojave sections of the fault.

中文翻译：

---

伊丽莎白湖的圣安德烈亚斯断层古地震记录：为什么莫哈韦剖面上的地表破裂地震较少？

活动断层的结构复杂性和沿断层系统的应力释放历史可以控制单个地震破裂的位置和范围。尤其是断层弯曲通常被认为是终止地震破裂的一种可能的机制。然而，很少有记录可以研究这些因素如何影响地震沿断层的复发。我们为伊丽莎白湖南部的圣安德烈亚斯断层提出了一种新的古地震年代学，并将这一记录与现有的古地震记录结合起来，以检验地震的发生时间和频率如何通过主要的约束弯曲而变化。该限制弯曲具有成熟的、贯穿的右侧走滑断层、两个主要断层交叉点、拟议的地下断层倾角变化和一个 > 200 km长的断层与区域板块运动不一致。弗雷泽山、伊丽莎白湖、帕莱特溪、赖特伍德和皮特曼峡谷古地震遗址位于断层弯曲之间的圣安德烈亚斯断层的这条相对线性的表面轨迹上。我们在伊丽莎白湖的古地震调查记录了自公元 1100 年以来发生的 4-5 次地震，与帕莱特溪记录的地震次数相似。相比之下，弗雷泽山和赖特伍德遗址在同一时期分别记录了 8-9 次地震。地震频率的差异表明，与断层折弯和交叉点附近发生的地震相比，约束折弯的中央部分破裂的地震要少。此外，