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Table 1. Comparison of the shear-wave splitting results between before and after the Tohoku Earthquake. The averaged and standard deviation (S.D.) data of the polarization direction (ϕ) and time-lag (τ) are shown.

From: Shear-wave splitting in a region with newly-activated seismicity after the 2011 Tohoku earthquake

   Before the 2011 Tohoku Earthquake After the 2011 Tohoku Earthquake
Station Name Number ϕ (deg.) S.D. ϕ (deg.) τ (sec) S.D. ϕ (sec) Number ϕ(deg.) S.D. ϕ (deg.) τ (sec) S.D. τ (sec)
IWAKMZ 15 41.6 53.1 0.051 0.036 171 51.7 40.1 0.049 0.041
N.IWWH 10 10.5 25.6 0.071 0.058 181 19.7 37.0 0.047 0.033
N.JUOH 1 167.0 0.060 105 57.3 33.9 0.045 0.026
N.KIBH 4 52.3 15.3 0.073 0.011 212 42.1 29.5 0.026 0.015