Resonant signals in the lithosphere-atmosphere-ionosphere coupling

Chieh-Hung Chen; Yang-Yi Sun; Xuemin Zhang; Yongxin Gao; Fei Wang; Kai Lin; Chi-Chia Tang; Rong Huang; Rui Xu; Jing Liu; Yali Wang; Cong Chen

doi:10.1038/s41598-022-18887-1

Resonant signals in the lithosphere-atmosphere-ionosphere coupling

Sci Rep. 2022 Aug 26;12(1):14587. doi: 10.1038/s41598-022-18887-1.

Authors

Chieh-Hung Chen¹, Yang-Yi Sun², Xuemin Zhang³, Yongxin Gao⁴, Fei Wang⁵, Kai Lin², Chi-Chia Tang², Rong Huang², Rui Xu⁶, Jing Liu³, Yali Wang⁷, Cong Chen⁶

Affiliations

¹ Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, 430074, China. nononochchen@gmail.com.
² Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, 430074, China.
³ Institute of Earthquake Forecasting, China Earthquake Administration, Beijing, 100036, China.
⁴ Applied Institute of Mechanics, School of Civil Engineering, Hefei University of Technology, Hefei, 230009, China.
⁵ Department of Geological Engineering, Chengdu University of Technology, Chengdu, 610059, China.
⁶ Sichuan Earthquake Bureau, Chengdu, 610041, China.
⁷ China Earthquake Networks Center, Beijing, 100045, China.

Abstract

A study in the lithosphere, atmosphere and ionosphere (LAI) coupling often troubles scientists due to a certain distance between distinct instruments, which monitor geophysical parameters in different spheres. An instrumental system was established in southwest China (Leshan; LESH) for monitoring vibrations and perturbations in LAI (MVP-LAI). A ground-based Global Navigation Satellite System (GNSS) receiver at the YADU station locates ~ 260 km away that continuously receives electromagnetic signals transmitted from the BeiDou navigation System (BDS) geostationary satellites to monitor the total electron content (TEC) at the ionospheric pierce point right over the MVP-LAI system. The employment of YADU TEC benefits in elimination of possible shaking effects happening on multiple instruments at the LESH station and mitigation the troubles due to the discrepancy in observation places. Through a stacking process on the retrieved data for increase of signal to noise ratios, a novel phenomenon of the resonant LAI coupling at a fundamental mode of ~ 3.4 mHz and its multiples persists in ground vibrations, atmospheric pressure and TEC retrieved from the MVP-LAI system and the YADU station. The retrieved data share frequencies during the operational period of 1.5 months that is irrelevant to obvious events in the lithosphere, atmosphere and ionosphere. The persistence of the resonant LAI coupling is essential in the Earth's system.

Abstract

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