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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Detection of small crustal deformation caused by slow slip events in southwest Japan using GNSS and tremor data

Fig. 3

Examples of the release velocity patterns with various thresholds between April 1, 2004 and December 31, 2009. Blue arrows indicate the estimated release velocities per day. Error ellipses at arrow heads show one standard error. Orange dots indicate the epicenters of non-volcanic tremors (Annoura et al. 2016) during our analysis period. Black arrows in circles are the expected directions of tectonic stress release, which is opposite to the direction of the subducting Philippine Sea Plate based on MORVEL (DeMets et al. 2010). a Release velocities with a tremor energy threshold of \(0.05 \times 10^{7} \;{\text{J}}\). b Same as a, but with a tremor energy threshold of \(0.35 \times 10^{7} \;{\text{J}}\). c Same as a, but with a tremor energy threshold of \(1.30 \times 10^{7} \;{\text{J}}\). d Same as a, but with a tremor energy threshold of \(2.00 \times 10^{7} \;{\text{J}}\)

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