{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T20:28:57Z","timestamp":1771100937552,"version":"3.50.1"},"reference-count":79,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,2,11]],"date-time":"2024-02-11T00:00:00Z","timestamp":1707609600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"APSCO Earthquake Research Project Phase \u2161 and ISSI-Beijing","award":["2019-IT33"],"award-info":[{"award-number":["2019-IT33"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The position between BeiDou geostationary Earth orbit (GEO) satellites and ground-based receiving stations can roughly be considered to be constant with negligible fluctuations; thus, the total electron content (TEC) data over a fixed ionospheric piercing point (IPP) can be continuously acquired, which is advantageous for monitoring ionospheric disturbances. Focused on the Jiuzhaigou Ms7.0 earthquake that occurred on 8 August 2017, the TEC data inverted by the BeiDou GEO satellite were analyzed to extract ionospheric disturbances potentially associated with the earthquake. It was found that significant anomalies in ionospheric TEC occurred 10\u201311 days, 6\u20137 days, and 1\u20139 h prior to the earthquake, which was mainly located in the southeast and southwest directions within about 2500 km distance from the epicenter. Comparing the spatial and temporal characteristics between the ionospheric disturbance and the radon gas near the surface, the atmospheric electric field, and the spectrum of TEC data, it was considered that the chemical and acoustic\u2013gravity wave pathway may play an important role in the lithosphere\u2013atmosphere\u2013ionosphere coupling (LAIC) mechanism.<\/jats:p>","DOI":"10.3390\/rs16040660","type":"journal-article","created":{"date-parts":[[2024,2,12]],"date-time":"2024-02-12T06:19:59Z","timestamp":1707718799000},"page":"660","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["The Analysis of Ionospheric TEC Anomalies Prior to the Jiuzhaigou Ms7.0 Earthquake Based on BeiDou GEO Satellite Data"],"prefix":"10.3390","volume":"16","author":[{"given":"Xinyi","family":"Jia","sequence":"first","affiliation":[{"name":"Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China"}]},{"given":"Jing","family":"Liu","sequence":"additional","affiliation":[{"name":"Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7462-4463","authenticated-orcid":false,"given":"Xuemin","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,2,11]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Earthquake prediction: Progress, difficulties and prospect","volume":"28","author":"Chen","year":"2007","journal-title":"Seismol. 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