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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Electrical conductive fluid-rich zones and their influence on the earthquake initiation, growth, and arrest processes: observations from the 2016 Kumamoto earthquake sequence, Kyushu Island, Japan

Fig. 4

Relationship between earthquake magnitude and distance to a low-resistivity zone (LRZ). Crosses and open circles represent earthquakes before and after the 2016 Kumamoto earthquake sequence, respectively (red: within LRZ, black: outside of LRZ). Here, we defined the low-resistivity zones as < 30 Ωm structures. Blue and red stars indicate the Mw 6.2 foreshock and Mw 7.0 mainshock, respectively. We used only the hypocenters within a 40-km radius of the mainshock. Yellow circles indicate the average distance values for three magnitude ranges (M1–M3, M3–M5, and M5–M7), which were calculated for the hypocenters that were located outside of LRZs. Histograms of the earthquake magnitudes (upper) and earthquake distances to the nearest LRZ (right) are also shown. The red area in the histogram indicates the hypocenters within the LRZ

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