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ANGEO | Articles | Volume 38, issue 5
Ann. Geophys., 38, 969–981, 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Satellite observations for space weather and geo-hazard

Ann. Geophys., 38, 969–981, 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 10 Sep 2020

Regular paper | 10 Sep 2020

The very low-frequency transmitter radio wave anomalies related to the 2010 Ms 7.1 Yushu earthquake observed by the DEMETER satellite and the possible mechanism

Shufan Zhao et al.

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Cited articles

Bilitza, D., Altadill, D., Truhlik, V., Shubin, V., Galkin, I., Reinisch, B., and Huang, X.: International Reference Ionosphere 2016: From ionospheric climate to real-time weather predictions, Space Weather, 15, 418–429, 2017. 
Budden, K.: The Propagation Of Radio Waves: The Theory Of Radio Waves Of Low Power In The Ionosphere And Magnetosphere, Cambridge University Press, Cambridge, United Kingdom, 669 pp., 1985. 
Clilverd, M. A., Rodger, C. J., Gamble, R., Meredith, N. P., Parrot, M., Berthelier, J. J., and Thomson, N. R.: Ground-based transmitter signals observed from space: Ducted or nonducted?, J. Geophys. Res.-Atmos., 113, A04211,, 2008. 
Cohen, M. B. and Inan, U. S.: Terrestrial VLF transmitter injection into the magnetosphere, J. Geophys. Res.-Space, 117,, 2012. 
Dobrovolsky, I. P., Zubkov, S. I., and Miachkin, V. I.: Estimation of the size of earthquake preparation zones, Pure Appl. Geophys., 117, 1025–1044, 1979. 
Publications Copernicus
Short summary
We use satellite data to analyze precursory anomalies of the western China Ms 7.1 Yushu earthquake by analyzing the signal-to-noise ratio (SNR) and using the full-wave model to illustrate a possible mechanism for how the anomalies occurred. The results show that very low-frequency (VLF) radio wave SNR in the ionosphere decreased before the Yushu earthquake. The full-wave simulation results confirm that electron density variation in the lower ionosphere will affect VLF radio signal SNR.
We use satellite data to analyze precursory anomalies of the western China Ms 7.1 Yushu...