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In order to verify and clarify the ULF seismo-magnetic phenomena, a statistical investigation of the relation between magnetic anomalies and local seismicity has been performed. Geomagnetic data observed during 2001∼2010 at the Kakioka observation (JMA), Izu and Boso stations have been analyzed. Energy of ULF geomagnetic signals at the frequency around 0.01Hz has been investigated by wavelet transform...
In this paper, neural network based ionospheric tomography was performed to investigate the detailed structure that may be associated with earthquakes. The 2007 Southern Sumatra earthquake (M8.5) is selected because significant decreases in the Total Electron Content (TEC) have been confirmed by GPS data analysis. With respect to the analyzed earthquake, we detected significant decreases at heights...
Recently electromagnetic phenomena have been considered as a promising candidate for short-term earthquake prediction. In this study, we have investigated ULF (Ultra Low Frequency) electromagnetic phenomena possibly associated with underground activities in Izu and Boso Peninsula, Japan during 2000–2010. Daily average energy of geomagnetic signals at the frequency around 100Hz has been examined, and...
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