Seismo-Tsunamigenic Ionospheric Hole Triggered by M 9.0 2011 off the Pacific Coast of Tohoku Earthquake

  • Author(s): Masashi Kamogawa, Yoshihiro Kakinami, Shigeto Watanabe, Jann-Yenq Liu, and Yasuyuki Watanabe
  • DOI: 10.3319/TAO.2011.11.14.01(AA)
  • Keywords: Earthquake, Ionospheric disturbance, Acoustic gravity wave, Rayleigh wave, Tsunami, Ionospheric hole

Masashi Kamogawa, Yoshihiro Kakinami, Shigeto Watanabe, Jann-Yenq Liu, and Yasuyuki Watanabe

Abstract

Giant earthquake and tsunami widely disturbed ionospheric plasma via acoustic gravity waves. During the M 9.0 2011 off the Pacific coast of Tohoku earthquake, the ionospheric disturbances were generated by co-seismic epicentral ground/sea surface motion, Rayleigh-wave traveling, and tsunami-wave traveling. In addition, seismo-tsunamigenic ionospheric hole, widely sudden depression of ionospheric total electron content, was observed. The ionospheric hole gradually disappeared within roughly a few minutes.

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