Groups of repeating earthquakes, which occur in approximately the same location and possess a similar focal mechanism, have been extracted in various tectonic environments worldwide. Their recurrence interval has been used to estimate the spatiotemporal evolution of aseismic slip along major tectonic boundaries. Furthermore, slight changes between the waveforms of repeating earthquakes have been analyzed to delineate temporal changes in the local seismic velocity structure. Here, we construct a long-term catalog of small repeating earthquakes in the central Japan since 1981 and throughout the Japanese Islands since 2001 (2001–2019) based on waveform similarity and relative source locations. Most of the long-duration sequences are located near the strongly coupled areas of the Philippine Sea and Pacific plates as they subduct from the Ryukyu–Nankai–Sagami and Kuril–Japan trenches, respectively. Many of the repeating sequences that occur in shallow crustal environments are short-lived. This repeating earthquake catalog allows us to estimate the slip history along each tectonic boundary. We believe that this and similar catalogs will be useful for future investigations of source processes, temporal slip and stress changes along faults, and local velocity structures, thereby providing new insights into earthquake generation mechanisms.

中文翻译：

---

日本列岛小型重复地震目录

已在世界各地的各种构造环境中提取出发生在大致相同位置并具有相似震源机制的重复地震组。它们的重复间隔已被用于估计沿主要构造边界的抗震滑动的时空演化。此外，还分析了重复地震波形之间的细微变化，以描绘局部地震速度结构的时间变化。在这里，我们根据波形相似性和相对震源位置，构建了自 1981 年以来日本中部和自 2001 年（2001-2019 年）以来整个日本群岛的小型重复地震的长期目录。大多数长期序列位于菲律宾海和太平洋板块的强耦合区域附近，因为它们分别从琉球-南海-相模和千岛-日本海沟俯冲。许多发生在浅地壳环境中的重复序列都是短暂的。这个重复的地震目录使我们能够估计沿每个构造边界的滑动历史。我们相信，该目录和类似目录将有助于未来研究震源过程、沿断层的时间滑移和应力变化以及局部速度结构，从而为地震发生机制提供新的见解。这个重复的地震目录使我们能够估计沿每个构造边界的滑动历史。我们相信，该目录和类似目录将有助于未来研究震源过程、沿断层的时间滑移和应力变化以及局部速度结构，从而为地震发生机制提供新的见解。这个重复的地震目录使我们能够估计沿每个构造边界的滑动历史。我们相信，该目录和类似目录将有助于未来研究震源过程、沿断层的时间滑移和应力变化以及局部速度结构，从而为地震发生机制提供新的见解。