The ionospheric responses to the 2011 Tohoku, 2012 Haida Gwaii, and 2010 Chile tsunamis: Effects of tsunami orientation and observation geometry

Earth and Space Science

Matthew A. Grawe¹ 

[1] ORCID:orcid.org/0000-0001-9776-1209

关键词: tsunami;    ionosphere;    coupling;    TEC;    airglow;   

DOI  :  10.1002/2015EA000132

来源: Wiley

【 摘 要 】

Abstract

We show the ionospheric signatures of the 28 October 2012 Haida Gwaii tsunami in both the total electron content (TEC) and the airglow layer. In addition, previously reported ionospheric signatures from the 11 March 2011 Tohoku and 27 February 2010 Chile tsunamis are reexplored in comparison to the newer Haida Gwaii detections. These events provide excellent test cases in the study of tsunami-ionospheric coupling efficiency, which is most notably affected by the observation geometry, tsunami propagation direction, and background ionospheric density. A simple calculation is developed that incorporates observation geometry to predict the relative coupling efficiency. The predictions are compared to the TEC observations and limitations are discussed.

【 授权许可】

CC BY-NC-ND   
©2015. The Authors.

Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.