Tsunami-driven ionospheric perturbations associated with the 2011 Tohoku earthquake as detected by subionospheric VLF signals

Geomatics, Natural Hazards & Risk. 2014;5(4):285-292 DOI 10.1080/19475705.2014.888100


Journal Homepage

Journal Title: Geomatics, Natural Hazards & Risk

ISSN: 1947-5705 (Print); 1947-5713 (Online)

Publisher: Taylor & Francis Group

LCC Subject Category: Technology: Environmental technology. Sanitary engineering | Geography. Anthropology. Recreation: Environmental sciences | Social Sciences: Industries. Land use. Labor: Management. Industrial management: Risk in industry. Risk management

Country of publisher: United Kingdom

Language of fulltext: English

Full-text formats available: PDF, HTML



A. Rozhnoi (Russian Academy of Sciences)

M. Solovieva (Russian Academy of Sciences)

M. Hayakawa (University of Electro-Communications)

H. Yamaguchi (Fuji Security Systems Co. Ltd.)

Y. Hobara (University of Electro-Communications)

B. Levin (Far East Branch of Russian Academy of Sciences)

V. Fedun (University of Sheffield)


Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 42 weeks


Abstract | Full Text

The subionospheric data from a Japanese very low frequency/low frequency (VLF/LF) receiving station at Moshiri, Hokkaido, are used to detect the response of the lower ionosphere to the tsunami triggered by the 2011 Tohoku earthquake. Disturbances in the phase and amplitude of VLF signals propagating from the transmitter in Hawaiian Islands are observed during the tsunami wave passage, and these effects in the ionosphere are compared to the in situ sea-level global positioning system (GPS) measurements near Japan. The frequency of the maximum spectral amplitude both for the VLF and GPS data is found to be in the range of periods of 8–50 min, which is likely to correspond to the period of the internal gravity waves generated by the tsunami.