标题： 震前2020年希腊萨摩斯Mw7.0主震在等效维度空间中显示的聚类指示 显示英文标题

标题： Clustering indications before the Mw7.0 2020 Samos, Greece, main shock as revealed in an equivalent dimensions space

摘要： 用于提供研究地震群集新方法的等效维度转换被用来分析2020年希腊萨摩斯Mw7.0主震的准备阶段。 分析考虑了2006年至2020年10月期间发生的地震，覆盖区域扩展为地震破裂长度的三倍。 每次地震通过其震级、事件间时间（自上次地震以来的间隔）和事件间空间距离（连续地震震中之间的距离）进行参数化。 将这些参数转换为等效维度使得它们可以直接比较。 通过在连续的100次事件数据窗口内计算的此转换参数空间中地震之间的平均距离来量化群集程度。 结果揭示了一个明显的模式，在主震前的十二年期间，平均距离持续增加。 这些平均距离的时间变化是由所用参数空间中地震群集的系统性演变驱动的。 从双群集系统开始，当距离最小时，群集发展沿着两个分支继续，并在主震前形成了五个具有不同特征的地震群集。 显示英文摘要

摘要： The transformation to equivalent dimensions that offers a novel approach for investigating earthquake clustering was engaged to analyze the preparatory phase of the 2020 Samos, Greece, Mw7.0 main shock. The analysis considered earthquakes that occurred between 2006 and October 2020, covering an area extended three times the length of the main rupture. Each earthquake was parameterized by its magnitude, the interevent time (interval since the previous earthquake), and the interevent spatial distance (distance between the epicenters of consecutive earthquakes). Transforming these parameters into equivalent dimensions allowed them to be directly compared. The degree of clustering was quantified using the average distance between earthquakes in this transformed parameter space, calculated within consecutive 100 events data windows. Results revealed a distinct pattern, the average distance was increasing steadily during the twelve year period before the main shock. These temporal changes in the average distance were driven by a systematic evolution of earthquake clustering in the used parameter space. Beginning from a two-cluster system, when the distance was minimal, the clustering development continued along two branches and ended before the main shock with the formation of five earthquake clusters of different characteristics.