Science. 2017 Jun 16;356(6343):1157-1160. doi: 10.1126/science.aan3120.
The discovery of slow earthquakes has revolutionized the field of earthquake seismology. Defining the locations of these events and the conditions that favor their occurrence provides important insights into the slip behavior of tectonic faults. We report on a family of recurring slow-slip events (SSEs) on the plate interface immediately seaward of repeated historical moment magnitude () 8 earthquake rupture areas offshore of Japan. The SSEs continue for days to several weeks, include both spontaneous and triggered slip, recur every 8 to 15 months, and are accompanied by swarms of low-frequency tremors. We can explain the SSEs with 1 to 4 centimeters of slip along the megathrust, centered 25 to 35 kilometers (km) from the trench (4 to 10 km depth). The SSEs accommodate 30 to 55% of the plate motion, indicating frequent release of accumulated strain near the trench.
慢地震的发现彻底改变了地震地震学领域。确定这些事件的位置和有利于其发生的条件，为构造断层的滑动行为提供了重要的见解。我们报告了一系列在日本近海重复历史矩震级（）8 级地震破裂区以外的板块界面上反复发生的慢滑动事件（SSE）。SSE 持续数天到数周，包括自发和触发的滑动，每 8 到 15 个月复发一次，并伴有低频地震群。我们可以用沿着主震带的 1 到 4 厘米的滑动来解释 SSE，这些滑动位于海沟 25 到 35 公里（公里）处（4 到 10 公里深度）。SSE 可容纳 30 到 55%的板块运动，表明在海沟附近经常释放累积应变。
