University of Illinois Urbana-Champaign

Investigating Tsunami-Ionospheric Coupling Efficiency

Grawe, Matthew A.

Content Files
ECE499-Sp2015-grawe.pdf

Permalink

https://hdl.handle.net/2142/78990

Description

Title
Investigating Tsunami-Ionospheric Coupling Efficiency
Author(s)
Grawe, Matthew A.
Contributor(s)
Makela, Jonathan J.
Issue Date
2015-05
Keyword(s)
  • ionosphere
  • tsunami
  • airglow
  • total electron content
  • GPS
  • magnetic field
Date of Ingest
2015-08-03T14:02:32Z
Abstract
Coupling has been shown to exist between tsunamis and the upper atmosphere, making their detection in the total electron content (TEC) and the airglow layer possible. However, a quantitative relationship between the strength of the ionospheric signature and the sea level variation remains elusive. Here, we show the ionospheric detection of the 28 October 2012 Haida Gwaii tsunami in both the TEC and the airglow layer. Previously reported ionospheric signatures from the 11 March 2011 Tohoku tsunami are re-explored in comparison to the newer Haida Gwaii detections. Both events provide excellent test cases in the study of tsunami ionospheric coupling efficiency which is most notably affected by the observation geometry and the tsunami propagation direction. A simple a priori model based on the problem geometry is developed that predicts the relative coupling effi ciency while also incorporating the observability of the gravity wave. Predictions are compared to observations and the limitations of the model are discussed in an effort to motivate future studies.
Type of Resource
other
Genre of Resource
Other
Language
en
Permalink
http://hdl.handle.net/2142/78990
Sponsor(s)/Grant Number(s)
Office of Naval Research/N00014-13-1-0350

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