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2019-07-23
Geomagnetic Field Perturbations Resulted from Tsunami Wave Impact on the Ionosphere
By
Progress In Electromagnetics Research B, Vol. 85, 49-63, 2019
Abstract
The generation mechanism of the geomagnetic field perturbations associated with tsunami wave propagation in ocean is examined. The geomagnetic perturbations are produced by electric currents generated in both the seawater and conductive layers of the ionosphere. The electric current in conductive seawater is caused by the seawater motion due totsunami wave propagation whereas the current in the ionospheric plasmais generated by acoustic gravity wave (AGW) incident on the ionosphere from the atmosphere. The AGW is originated from vertical displacements of seawater surface due to the tsunami wave propagation. Although the ionospheric plasma conductivity is much lower than the seawater conductivity, the electric current in the ionosphere can be greater than that in the seawater due to an exponential increase of amplitude of the upward-propagating AGW. Our calculations are indicative of the possibility of space monitoring of tsunami wave based on onboard measurements of the geomagnetic field perturbations.
Citation
Valery M. Sorokin, Alexey K. Yashchenko, and Vadim V. Surkov, "Geomagnetic Field Perturbations Resulted from Tsunami Wave Impact on the Ionosphere," Progress In Electromagnetics Research B, Vol. 85, 49-63, 2019.
doi:10.2528/PIERB19050201
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