School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA.
Science. 2010 Feb 26;327(5969):1119-22. doi: 10.1126/science.1182781. Epub 2010 Jan 21.
The moment magnitude (Mw) 7.9 Fort Tejon earthquake of 1857, with a approximately 350-kilometer-long surface rupture, was the most recent major earthquake along the south-central San Andreas Fault, California. Based on previous measurements of its surface slip distribution, rupture along the approximately 60-kilometer-long Carrizo segment was thought to control the recurrence of 1857-like earthquakes. New high-resolution topographic data show that the average slip along the Carrizo segment during the 1857 event was 5.3 +/- 1.4 meters, eliminating the core assumption for a linkage between Carrizo segment rupture and recurrence of major earthquakes along the south-central San Andreas Fault. Earthquake slip along the Carrizo segment may recur in earthquake clusters with cumulative slip of approximately 5 meters.
1857 年 Fort Tejon 地震的矩震级（Mw）为 7.9 级，地表破裂约 350 公里长，是加利福尼亚州中南部圣安德烈亚斯断层最近一次主要地震。基于对其地表滑动分布的先前测量，人们认为 Carrizo 段约 60 公里长的破裂控制了类似 1857 年地震的复发。新的高分辨率地形数据显示，在 1857 年事件中，Carrizo 段的平均滑动量为 5.3 +/- 1.4 米，消除了 Carrizo 段破裂与中南部圣安德烈亚斯断层主要地震复发之间联系的核心假设。Carrizo 段的地震滑动可能会在累积滑动量约为 5 米的地震群中再次发生。
