Due to the extremely complex regional geological tectonic movements in the Alpide Himalayan seismic belt with the dense population and rapid economic development, the frequent seismic activity has caused huge concern. In geology, the research on the spatiotemporal characteristics of seismic activity in different areas at different scales has always been valuable to explore the mechanism of seismic activity for further simulation and prediction of the seismic activity. Using the spatial autocorrelation analysis in this study, we analyzed the spatiotemporal dynamic characteristics of seismic activity in the Alpide Himalayan seismic belt. According to the historical earthquake list (from 1973 to 2017), the data are divided into five periods. Compared with the commonality and diversity of the spatiotemporal characteristics of seismic activity in different periods, it shows that: there is a positive spatial autocorrelation in each period, which proves the spatial aggregation of the seismic activity in the Alpide Himalayan seismic belt. Nevertheless, over time, the spatial aggregation distribution is gradually diminishing from 1973 to 2017; From the Local Spatial Autocorrelation analysis, the spatial aggregation characteristics of seismic activity change with time and have a significant differentiation among the regions. According to the comparison of Local Spatial Autocorrelation characteristics in different periods, seismic activities in the Alpide Himalayan seismic belt were consistent with the periodic characteristics. Assuming the alternating seismic calm period and active period, we could notice that it turned from the active period to the calm period around 2008, which is the most recent turning point between the active and calm periods. At last, the spatio-temporal dynamic characteristics of the seismic activity in the Alpide Himalayan seismic belt is not only consistent with the formation mechanism of seismic activity but also represents the spatial disparity of the geological tectonic movements. It is the feasibility and effectiveness to explore the seismic mechanism based on spatio-temporal dynamic characteristics of the seismic activity.

中文翻译：

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阿尔卑斯喜马拉雅地震带的地震时空特征

由于人口稠密，经济发展迅速的阿尔皮德喜马拉雅地震带的区域地质构造运动极为复杂，频繁的地震活动引起了人们的极大关注。在地质学中，对不同规模，不同规模的地震活动的时空特征的研究一直对探索地震活动的机理进行进一步的模拟和预测具有重要的参考价值。使用这项研究中的空间自相关分析，我们分析了喜马拉雅Alpide地震带地震活动的时空动态特征。根据历史地震清单（从1973年到2017年），数据分为五个时期。通过比较不同时期地震活动时空特征的共性和多样性，可以看出：每个时期都存在正的空间自相关，证明了阿尔皮德喜马拉雅地震带地震活动的空间聚集。然而，随着时间的流逝，空间聚集分布从1973年到2017年逐渐减少；根据局部空间自相关分析，地震活动的空间聚集特征随时间变化，并且在各地区之间存在显着差异。通过对不同时期局部空间自相关特征的比较，发现阿尔必得喜马拉雅地震带的地震活动与周期性特征一致。假设地震平静期和活动期交替出现，我们可以注意到，它已从活跃期转变为2008年左右的平静期，这是活跃期与平静期之间的最新转折点。最后，Alpide喜马拉雅地震带地震活动的时空动态特征不仅与地震活动的形成机制相吻合，而且还代表了地质构造运动的空间差异。基于地震活动的时空动态特征探索地震机制是可行和有效的。Alpide喜马拉雅地震带地震活动的时空动态特征不仅与地震活动的形成机理相一致，而且还代表了地质构造运动的空间差异。基于地震活动的时空动态特征探索地震机制是可行和有效的。Alpide喜马拉雅地震带地震活动的时空动态特征不仅与地震活动的形成机理相一致，而且还代表了地质构造运动的空间差异。基于地震活动的时空动态特征探索地震机制是可行和有效的。