Seismic T waves, which result from transformation of hydroacoustic to seismic energy at coastlines, were investigated for two strong earthquakes. A 2014 Caribbean event generated seismic T waves that were detected at over 250 seismometers along the east coast of the U.S., primarily at seismic stations operated by the USArray Transportable Array. A 2006 Hawaiian event generated seismic T waves observed at over 100 seismometers along the west coast. Seismic T‐wave propagation was treated as locally 2D where the incoming hydroacoustic wavefronts were nearly parallel to the coastlines. Along the east coast, seismic T‐wave propagation velocities were consistent with surface waves and a polarization analysis indicated that they were transverse waves, supporting their interpretation as Love waves. They were observed at inland distances up to 1134 km from the east coast. Along the west coast, the propagation velocity was over 5 km/s and a polarization analysis confirmed that the seismic T waves propagated as seismic P waves. Differences between the modes of propagation along the east and west coasts are attributed to differences in the slope and thickness of the sediment coverage at the continental slopes where hydroacoustic to seismic conversion takes place.

中文翻译：

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密集地震台网的地震T波观测

对于两次强烈地震，研究了海岸线上水声转换为地震能产生的地震T波。2014年的一次加勒比海事件产生了地震T波，这些波在美国东海岸的250多个地震仪上被探测到，主要是在USArray可移动阵列操作的地震台站上。2006年的夏威夷事件产生了沿西海岸100多个地震仪观测到的地震T波。地震T波传播被视为局部二维，其中传入的水声波前几乎与海岸线平行。沿东海岸，地震T波传播速度与表面波一致，极化分析表明它们是横波，支持将其解释为Love波。在距东海岸1134公里的内陆距离观察到它们。沿西海岸，传播速度超过5 km / s，极化分析证实地震T波以地震P波的形式传播。沿东海岸和西海岸的传播方式之间的差异归因于发生水声到地震转换的大陆性斜坡的坡度和沉积物覆盖厚度的差异。