Conclusion

The 2 elements of epicenter of earthquake have strong correlation (almost 1.0000) among more than 3 earthquakes under the gauge (meaning special conditions of elements). By the case, even occurrence time as element can be included by the case. It means they are not random. If we can find out the gauge rules, the prediction of earthquakes. Maybe , it's possible by AI analysis for mega database of Japan Meteorological Agency. The analysis of the different pattern of the graphs will be helpful for the prediction.

Special thanks for Aunt Yoshimi, 

  With nostalgic memories of your bright and kind smile.