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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Temporal changes in the distinct scattered wave packets associated with earthquake swarm activity beneath the Moriyoshi-zan volcano, northeastern Japan

Fig. 8

An example of semblance analysis for three-component seismograms from the earthquake (November 25, 2012, 07:55:17 JST (UT + 9), M2.8). Four panels in each component are, from top to bottom, seismograms (a, e, and i), slowness (b, f, and j), back-azimuth (c, g, and k), and maximum semblance value together with the RMS envelope (d, h, and l), respectively. The background color in slowness and back-azimuth plots represents semblance values. Circles in the same panels denote the slowness and back-azimuth with the maximum semblance value in every time step. The red and green arrows indicate the arrival times of P- and S-waves, respectively. Pink lines in c, g, and k indicate the back-azimuth to the event epicenter

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