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Letter

Nature Geoscience 1, 676–678 (1 October 2008) | doi:10.1038/ngeo288

Non-volcanic tremor resulting from the combined effect of Earth tides and slow slip events

Ryoko Nakata , Naoki Suda & Hiroshi Tsuruoka

Slow slip events are accompanied by swarms of non-volcanic tremor along the subduction zone of the Philippine Sea plate in southwest Japan: the swarms often occur with a periodicity of about 12 or 24|[thinsp]|h (refs|[nbsp]|4, 5). These episodic events are considered to be a manifestation of stress relaxation at the subducting plate interface.