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Supporting the surface charging mechanism of seismic-electromagnetic phenomena by the direct measurements of the electron and hole trapping centers

電子および正孔測定による地震電磁気現象における表面帯電メカニズムの解明

田中 桐葉*; 長濱 裕幸*; 武藤 潤*; 岡 壽崇   ; 矢部 康男*

Tanaka, Kiriha*; Nagahama, Hiroyuki*; Muto, Jun*; Oka, Toshitaka; Yabe, Yasuo*

地震に先行する電磁気現象の観測は地震予測に利用できると考えられているが、電磁気現象の発現メカニズムの詳細は不明である。本研究では、電子スピン共鳴法を用いて電子・正孔捕獲中心の濃度を調べたところ、石英砂中の破砕が電磁気現象における表面帯電を引き起こす可能性があることがわかった。

The mechanisms of the seismic-electromagnetic phenomena attracted as precursors of short-term earthquake forecast have been suggested, however, it is still incompletely understood. Our results showed that the fracture by fault motions could produce the surface charges on the fault. It proves that the electromagnetic abnormalities by the fault motions may also be observed through the surface charging mechanism. Therefore, our study supports that the surface charging mechanism is plausible.

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