1987年10月洛杉矶市发生的地震揭示出在该市下有一些隐伏断层,若沿该断层线发生更剧烈的运动,会引起对潜在灾害的忧虑。虽然提出过存在这类断层的假设,但只是在人们分析资料时发现,10月1日的地震发生在以前不知道的断层上,而不是发生在人们最初认为的惠蒂尔断层上时,才第一次得到过硬的证据。该发现需要重新评定该地区的地震危 The October 1987 earthquake in Los Angeles revealed some hidden faults beneath the city, and more intense movement along the fault line could cause concern about potential disasters. Although hypotheses exist for the presence of such faults, it is only when people analyze the data that they found that the October 1 earthquake occurred on a fault not previously known, rather than on the Whittier fault that was originally thought For the first time, we have had excellent evidence. The findings need to re-evaluate the seismic hazard in the area