Fig. 2From: Repeating deep tremors on the plate interface beneath Kyushu, southwest Japan(a) Examples of tremor waveforms. (b) Power spectrum of noise (blue), ordinary earthquakes (black), and tremors (red). (c) Event times (dots) of tremor and SSE times (pink arrows) (Yarai and Ozawa, 2010) for the whole period (top) and a period of 3 days (bottom). The timing of ordinary earthquakes (Mw > 5) worldwide is compared in the lower layer.Back to article page