Abstract —For determining the focal mechanism and source depth of an earthquake, a frequent practice is to use surface wave records which can be highly noisy. In this case, these records should be preliminarily selected and filtered in a certain spectral band using a frequency-time analysis program. In this paper, we study how the determination uncertainties of earthquake parameters (source depth and focal mechanism) depend on the set of the records used in the analysis. For doing this, we use the jackknife statistical procedure. The results are presented for four events: the strongest aftershock in Tohoku, Japan, that occurred on March 11, 2011, the earthquake of April 25, 2015 in Nepal, and two earthquakes in Alaska on January 23 and November 30, 2018. The analysis conducted for these events shows that the effect of the selected set of records on the determination error of earthquake parameters depends on the focal mechanism and the source depth of the earthquake, the number of the considered records, and the degree of detail of the parametric grid used for constructing the earthquake source model.

中文翻译：

---

地震参数确定不确定度对面波记录集的依赖性

摘要 — 为了确定地震的震源机制和震源深度，经常使用可能具有高噪声的面波记录。在这种情况下，应使用频率时间分析程序在某个频谱带中初步选择和过滤这些记录。在本文中，我们研究了地震参数（震源深度和震源机制）的确定不确定性如何取决于分析中使用的记录集。为此，我们使用折刀统计程序。结果显示了四个事件：2011 年 3 月 11 日发生在日本东北的最强余震、2015 年 4 月 25 日在尼泊尔发生的地震以及 2018 年 1 月 23 日和 11 月 30 日在阿拉斯加发生的两次地震。