Spatial and Temporal Distribution of the Pre-Seismic Ionospheric Anomaly Prior to the 2011 Off the Pacific Coast of Tohoku Earthquake (Mw9.0)

• Hirooka Shinji

  Graduate School of Science, Chiba University

• Ichikawa Takashi

  Graduate School of Science, Chiba University

• Hattori Katsumi

  Graduate School of Science, Chiba University

• Han Peng

  Graduate School of Science, Chiba University

• Yoshino Chie

  Graduate School of Science, Chiba University

• Liu Jann-Yeng

  Graduate Institute of Space Science, National Central University

Bibliographic Information

Other Title

• 2011年東北地方太平洋沖地震（Mw9.0）に先行する電離圏異常の時空間分布
• 2011ネン トウホク チホウ タイヘイヨウオキ ジシン(Mw9.0)ニ センコウ スル デンリケン イジョウ ノ ジクウカン ブンプ

Abstract

The ionospheric anomalies possibly associated with large earthquakes have been reported by many researchers. In this paper, Total Electron Content (TEC) and tomography analyses have been applied to investigate the spatial and temporal distributions of ionospheric electron density prior to the 2011 Off the Pacific Coast of Tohoku earthquake (Mw9.0). Results show significant TEC enhancements and an interesting three dimensional structure prior to the main shock. As for temporal TEC changes, the TEC value increases 3-4 days before the earthquake remarkably, when the geomagnetic condition was relatively quiet. In addition, the abnormal TEC enhancement area in space was stalled above Japan during the period. Tomographic results show that three dimensional distribution of electron density decreases around 250 km altitude above the epicenter (peak is located just the east-region of the epicenter) and increases the mostly entire region between 300 and 400 km.

Journal

• IEEJ Transactions on Fundamentals and Materials

  IEEJ Transactions on Fundamentals and Materials 136 (5), 265-271, 2016

  The Institute of Electrical Engineers of Japan

Keywords

• the 2011 Off the Pacific Coast of Tohoku earthquake
• ionospheric anomaly
• total electron content
• ionospheric tomography

Details

• CRID: 1390001204599231488
• NII Article ID: 130005149175
• NII Book ID: AN10136312
• DOI: 10.1541/ieejfms.136.265
• ISSN: 13475533
• ISSN: 03854205
• NDL BIB ID: 027423791
• Web Site: http://id.ndl.go.jp/bib/027423791
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027423791
• Web Site: https://www.jstage.jst.go.jp/article/ieejfms/136/5/136_265/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed