Modeling the Near-field Ionospheric Disturbances During Earthquakes

Xing Meng, Attila Komjathy, Olga P. Verkhoglyadova, Giorgio Savastano, Mattia Crespi, Michela Ravanelli

Abstract: We present the latest development of the Wave Perturbation-Global Ionosphere-Thermosphere Model (WP-GITM), a three- dimensional physics-based numerical model for seismic/tsunami-ionosphere coupling via atmospheric acoustic-gravity waves. WP-GITM was previously applied to simulate the ionospheric perturbations resulted from the epicentral crustal movement by assuming spherical acoustic-gravity waves originated from a point source, which was specified by the seismic measurement at a single location nearby the epicenter. In this work, we extend WP-GITM to include the effects of Rayleigh surface waves and adapt WP-GITM to utilize seismic measurements from more than one location in the attempt to capture the radiation pattern of the seismic source. We apply the new WP-GITM to model the near-field co-seismic ionospheric perturbations during the 16 September 2015 Illapel earthquake. The comparison between the simulated ionospheric total electron content perturbations and the GPS observations shows promising results.
Published in: Proceedings of the ION 2019 Pacific PNT Meeting
April 8 - 11, 2019
Hilton Waikiki Beach
Honolulu, Hawaii
Pages: 854 - 861
Cite this article: Meng, Xing, Komjathy, Attila, Verkhoglyadova, Olga P., Savastano, Giorgio, Crespi, Mattia, Ravanelli, Michela, "Modeling the Near-field Ionospheric Disturbances During Earthquakes," Proceedings of the ION 2019 Pacific PNT Meeting, Honolulu, Hawaii, April 2019, pp. 854-861.
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