Resident Waves in the Ionosphere Before the M6.1 Dali and M7.3 Qinghai Earthquakes of 21–22 May 2021

Chieh Hung Chen; Yang Yi Sun; Rui Xu; Kai Lin; Fei Wang; Dixin Zhang; Yulin Zhou; Yongxin Gao; Xuemin Zhang; Huaizhong Yu; Jann Yenq Liu

doi:10.1029/2021EA002159

Resident Waves in the Ionosphere Before the M6.1 Dali and M7.3 Qinghai Earthquakes of 21–22 May 2021

Chieh Hung Chen, Yang Yi Sun, Rui Xu, Kai Lin, Fei Wang, Dixin Zhang, Yulin Zhou, Yongxin Gao, Xuemin Zhang, Huaizhong Yu, Jann Yenq Liu

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Geostationary BeiDou satellites monitor the total electron content (TEC) in the ionosphere over certain locations 24 hr per day without interruption and act as ionosphere-based seismometers. The system detected perturbations in TEC before both the M6.1 Dali and M7.3 Qinghai earthquakes that occurred during the night of 21–22 May 2021. The TEC perturbations reside mainly over an area within a distance of ∼700 km from the epicenters of the earthquakes. The standing waves revealed the persistence of a subsurface wave source before the occurrences of the earthquakes, which differs from the co-seismic ionospheric distributions propagating away from the epicenters. The resident waves in TEC and ground vibrations share a frequency of ∼0.004 Hz, which can be attributed to the resonant coupling between the lithosphere and ionosphere.

Original language	English
Article number	e2021EA002159
Journal	Earth and Space Science
Volume	9
Issue number	2
DOIs	https://doi.org/10.1029/2021EA002159
State	Published - Feb 2022

Keywords

LAI coupling
TEC perturbations
ground vibrations
resident waves

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10.1029/2021EA002159

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title = "Resident Waves in the Ionosphere Before the M6.1 Dali and M7.3 Qinghai Earthquakes of 21–22 May 2021",

abstract = "Geostationary BeiDou satellites monitor the total electron content (TEC) in the ionosphere over certain locations 24 hr per day without interruption and act as ionosphere-based seismometers. The system detected perturbations in TEC before both the M6.1 Dali and M7.3 Qinghai earthquakes that occurred during the night of 21–22 May 2021. The TEC perturbations reside mainly over an area within a distance of ∼700 km from the epicenters of the earthquakes. The standing waves revealed the persistence of a subsurface wave source before the occurrences of the earthquakes, which differs from the co-seismic ionospheric distributions propagating away from the epicenters. The resident waves in TEC and ground vibrations share a frequency of ∼0.004 Hz, which can be attributed to the resonant coupling between the lithosphere and ionosphere.",

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AU - Chen, Chieh Hung

AU - Sun, Yang Yi

AU - Xu, Rui

AU - Lin, Kai

AU - Wang, Fei

AU - Zhang, Dixin

AU - Zhou, Yulin

AU - Gao, Yongxin

AU - Zhang, Xuemin

AU - Yu, Huaizhong

AU - Liu, Jann Yenq

PY - 2022/2

Y1 - 2022/2

N2 - Geostationary BeiDou satellites monitor the total electron content (TEC) in the ionosphere over certain locations 24 hr per day without interruption and act as ionosphere-based seismometers. The system detected perturbations in TEC before both the M6.1 Dali and M7.3 Qinghai earthquakes that occurred during the night of 21–22 May 2021. The TEC perturbations reside mainly over an area within a distance of ∼700 km from the epicenters of the earthquakes. The standing waves revealed the persistence of a subsurface wave source before the occurrences of the earthquakes, which differs from the co-seismic ionospheric distributions propagating away from the epicenters. The resident waves in TEC and ground vibrations share a frequency of ∼0.004 Hz, which can be attributed to the resonant coupling between the lithosphere and ionosphere.

AB - Geostationary BeiDou satellites monitor the total electron content (TEC) in the ionosphere over certain locations 24 hr per day without interruption and act as ionosphere-based seismometers. The system detected perturbations in TEC before both the M6.1 Dali and M7.3 Qinghai earthquakes that occurred during the night of 21–22 May 2021. The TEC perturbations reside mainly over an area within a distance of ∼700 km from the epicenters of the earthquakes. The standing waves revealed the persistence of a subsurface wave source before the occurrences of the earthquakes, which differs from the co-seismic ionospheric distributions propagating away from the epicenters. The resident waves in TEC and ground vibrations share a frequency of ∼0.004 Hz, which can be attributed to the resonant coupling between the lithosphere and ionosphere.

KW - LAI coupling

KW - TEC perturbations

KW - ground vibrations

KW - resident waves

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U2 - 10.1029/2021EA002159

DO - 10.1029/2021EA002159

M3 - 期刊論文

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SN - 2333-5084

VL - 9

JO - Earth and Space Science

JF - Earth and Space Science

IS - 2

M1 - e2021EA002159

ER -

Resident Waves in the Ionosphere Before the M6.1 Dali and M7.3 Qinghai Earthquakes of 21–22 May 2021

Abstract

Keywords

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