The Anchorage Mw7.0 earthquake on November 30, 2018, was the most extensively felt event in the region since the 1964 Alaska Mw9.2 earthquake. Based on published data of source fault model, we performed a preliminary analysis on the Coulomb stress change produced by Anchorage earthquake in the neighboring region and faults. The

results show that the mainshock has triggered subsequent aftershocks, most of which are located in stress-increased region. The Anchorage earthquake also imparts Coulomb stress change on the Castle Mountain fault, with different fault segment ranging from − 2 × 10⁵ to 3.27 bar. Similarly, on the Border Range fault, this stress ranges from − 0.71 to 3.31 bar despite being inactive fault on present knowledge. Furthermore, on nodal planes I and II of the Anchorage Mw7.0 earthquake, the Coulomb stress change imparted by the 1964 Mw9.2 earthquake ranges from 2.490 to 3.968 bar and from 3.283 to 5.140 bar, respectively. These results indicate that the 1964 Mw9.2 earthquake produces a large amount of Coulomb stress on the seismogenic fault plane of the Anchorage Mw7.0 earthquake and promote it more closer to failure. These results contribute to our understanding of the seismic hazard in the region and on fault segments where the Coulomb stress has been sharply changed.

自1964年阿拉斯加Mw9.2地震以来，2018年11月30日的安克雷奇Mw7.0地震是该地区感受最广泛的事件。基于源断层模型的公开数据，我们对邻近地区的安克雷奇地震和断层产生的库仑应力变化进行了初步分析。这

结果表明，主震引发了随后的余震，其中大部分位于应力增加区域。安克雷奇地震还使城堡山断层发生库仑应力变化，断层段的范围为− 2×10 ⁵至3.27巴。类似地，在边界范围断层，尽管根据目前的知识，该应力为非活动断层，但其应力范围为− 0.71至3.31 bar。此外，在安克雷奇Mw7.0地震的I和II节点平面上，由1964年Mw9.2地震引起的库仑应力变化范围分别为2.490至3.968巴和3.283至5.140巴。这些结果表明，1964年的Mw9.2地震在安克雷奇Mw7.0地震的震源断层上产生大量库仑应力，并使地震更加接近破坏。这些结果有助于我们理解库仑应力急剧变化的区域和断层段的地震危险。