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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Spatio-temporal characteristics of frictional properties on the subducting Pacific Plate off the east of Tohoku district, Japan estimated from stress drops of small earthquakes

Fig. 5

a Spatial distribution of smoothed stress drop estimated by S-wave analyses from 2003 to 2010, which is before the 2011 Tohoku earthquake. Thin contours show the coseismic displacement of the 2011 Tohoku earthquake at an interval of 2 m, the same as Fig. 3 (Iinuma et al. 2012). Please note that values were not assigned at grid points with less than four earthquakes within 20 km of the epicentral distance. b Stress drops from 2012 to 2018. Clear temporal changes are observed associated with the 2011 Tohoku earthquake in areas C and D, corresponding to edges of the coseismic slip. c Stress drops for all the analyzed period of 2003 through 2018

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