We report tremor or local earthquake signals that occurred during the propagation of Love and Rayleigh waves from the 2012 Mw 8.6 Sumatra earthquake in three intraplate regions: Yellowstone, central Utah, and Raton basin (Colorado). These surface waves likely also dynamically triggered seismic activity along the western boundary of the North American plate, and did not trigger seismic activity in the central and eastern United States. We report additional potential dynamic triggering in the three aforementioned intraplate regions by surface waves from 37 additional large earthquakes, recorded between 2004 and 2017. These surface waves’ transient stresses generally appear to trigger tremor in seismically, volcanically, and hydrothermally active regions, such as Yellowstone, if the waves also arrive from favorable directions. These stresses do not appear to be decisive factors for triggering local earthquakes reported for the Raton basin and central Utah, whereas, surface waves’ incidence angles do appear to be important there.

中文翻译：

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美国板内区域定向动态触发的检测

我们报告了在 2012 年 Mw 8.6 苏门答腊地震在三个板块内区域：黄石、犹他州中部和拉顿盆地（科罗拉多州）传播洛夫波和瑞利波期间发生的震颤或局部地震信号。这些表面波很可能也沿北美板块的西部边界动态触发了地震活动，而没有在美国中部和东部触发地震活动。我们报告了 2004 年至 2017 年间记录的 37 次额外大地震的表面波在上述三个板内区域中的额外潜在动态触发。这些表面波的瞬态应力通常似乎在地震、火山和热液活动区域引发震颤，例如黄石，如果海浪也从有利的方向到达。