Typhoons generate ocean waves, which induce ground motions on the seafloor. Such processes can generate microseismic signals observed at far distances (Longuet-Higgins 1950; Tabulevich 1971; Sutton 1996; Bromirski et al. 1999; Tolman 1999; Grevemeyer et al. 2000; Kedar and Webb 2005; Webb 2007; Gerstoft et al. 2008; Kedar et al. 2008; Wilson and Makris 2008; Koper and de Foy 2008). However, direct observations on the deep seafloor under a typhoon were not available until now, due to the difficulty of field operations and the lack of proper...

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