42015-03-31 , 法政大学大学院デザイン工学研究科
This paper concerns with the optimization problems in the frequency fluctuation characteristics analysis of the signals emitted from the geomagnetic by earthquake. To work out an excellent forecast system on earthquakes, we apply our 1st order frequency fluctuation analysis along with k-mean method to the geomagnetic field signals. According to our research on a relationship between the earthquakes and geomagnetic field signals, it has been found that both of the earthquakes and geomagnetic field signals are tightly related each other. Application of our 1st order frequency fluctuation analysis along with k-mean method makes it possible to clarify this fact in a most reasonable manner.