Characterization of the Great 1964 Alaskan Earthquake at Low-Frequency and Determination of its Source Complexity

这项研究将调查非常长的周期波， 100到300秒，从第二大记录 1964年阿拉斯加大地震 很长的- 期间，WWSSN各站的记录将在 正常模式频带，以确定低频源 事件的特征，并确定这是否甚至 激发了异常数量的低频地震能量 的 源的复杂性将通过分析 长周期面波资料 结果将是 与研究人员的类似分析结果相比， 1960年智利发生了历史上最严重的地震 地震，为了更好地了解破裂的性质 这些巨大的地震，并检查可能性 这些事件与其他事件有着根本的不同 地震 由于这些事件的巨大规模和 地震和海啸的破坏性， 调查直接适用于全国地震 减少危害方案。

This research will investigate the very long period waves, 100 to 300 second period, from the second-greatest recorded earthquake in history, the 1964 Alaskan earthquake. The long- period recordings of the WWSSN stations will be examined in the normal mode band to determine the low-frequency source characteristics of the event and establish whether this even texcited an unusual amount of low-frequency seismic energy. The source complexity will be determined from an analysis of the long-period surface wave data. The results will then be compared with those obtained by the researchers' similar analysis of the greatest recorded earthquake in history, the 1960 Chilean earthquake, in order to better understand the nature of rupture of these very great earthquakes and to examine the possibility that these events are fundamentally different from other earthquakes. Because of these events' great size and destructiveness from both ground motion and tsunamis, their investigation has direct application to the National Earthquake Hazard Reduction Program.