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介绍2016年11月25日新疆阿克陶M_S6.7地震的基本参数、震源机制、序列类型、地震序列衰减特征和余震序列各项数字地震学资料,并就该序列与历史地震序列进行对比,提出震后趋势判定意见。结果显示,该序列为主-余型,余震序列衰减迅速,在较强余震前,序列P波初动呈现较好的一致性,振幅比表现出显著的低值过程,应力降和视应力则出现多点的高值突跳,这些异常的出现在时间上具有同步性。相较于历史地震序列,本次地震序列频度和强度均明显偏弱,且余震破裂尺度相对较大,判定后续存在发生强余震的可能。
This paper introduces the basic parameters of the M_S6.7 earthquake in Aktau, Xinjiang on November 25, 2016, source mechanisms, sequence types, attenuation characteristics of seismic sequences and digital seismological data of aftershock sequences. Comparing this sequence with historical seismic sequences, Put forward the opinions after the earthquake trend judgment. The results show that the sequence is dominant-residual and the sequence of aftershocks decays rapidly. Before the strong aftershocks, the initial P-wave sequence exhibits a good consistency, and the amplitude ratio shows a significant low value process. The stress drop and the apparent stress The emergence of more high-value kicks, the emergence of these anomalies in time synchronization. Compared with the historical earthquake sequence, the frequency and intensity of this earthquake sequence are obviously weaker, and the rupture scale of aftershock is relatively larger, so the possibility of strong aftershock occurred in the subsequent period.