Repeating earthquakes repeatedly rupture the same seismic asperity and are strongly linked to aseismic slip. Here, we study the repeating aftershocks of the April 16, 2016 M_W 7.8 Pedernales earthquake in Ecuador, which generated a large amount of afterslip. Using temporary and permanent stations, we correlate waveforms from a one‐year catalog of aftershocks. We sort events with a minimum correlation coefficient of 0.95 into preliminary families, which are then expanded using template‐matching to include events from April 2015 to June 2017. In total, 376 repeaters are classified into 62 families of 4–15 events. They are relocated, first using manual picks, and then using a double difference method. We find repeating earthquakes during the whole period, occurring primarily within large aftershock clusters on the edges of the areas of largest afterslip release. Their recurrence times, shortened by the mainshock, subsequently increase following an Omori‐type law, providing a timeframe for the afterslip's deceleration. Although they are linked temporally to the afterslip, repeater‐derived estimates of slip differ significantly from GPS‐based models. Combined with the fact that repeaters appear more spatially correlated with the afterslip gradient than with the afterslip maxima, we suggest that stress accumulation at the edge of the afterslip may guide repeater behavior.

中文翻译：

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在2016年厄瓜多尔MW 7.8 Pedernales地震余波边缘再次发生地震

重复地震反复破坏相同的地震凹凸，并与抗震滑动密切相关。在这里，我们研究2016年4月16日M _W的重复余震7.8厄瓜多尔的Pedernales地震引起大量的后滑。使用临时和永久站，我们将一年余震目录中的波形关联起来。我们将最小相关系数为0.95的事件分类到初步族中，然后使用模板匹配将其扩展到2015年4月至2017年6月的事件。总共将376个转发器分类为4-15个事件的62个族。将它们重新放置，首先使用手动镐，然后使用双差方法。我们发现在整个时期内重复发生地震，主要发生在最大的余震释放区域边缘的大型余震群内。它们的复发时间因主震而缩短，随后遵循大森型定律而增加，为后滑的减速提供了时间表。尽管它们在时间上与后滑相关，但中继器得出的滑移估计值与基于GPS的模型有很大不同。结合转发器在空间上与滑坡梯度的相关性大于在后滑最大值方面的事实，我们建议在滑移边缘的应力积累可能会指导转发器的行为。