Effect of Acoustic Gravity Waves Excited by Anomalous Electric Field on Ionosphere Before Strong Earthquakes

Xu, Tong; Hu, Yanli; Wang, Min; Wu, Jian; Wu, Zhensen; Suo, Yucheng

doi:10.11728/cjss2013.04.436

Cited by 1 publication

(1 citation statement)

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“…Many scholars have also analyzed the statistical characteristics of ionospheric anomalies in China. Xu et al [23] examined the data of 14 strong earthquakes of magnitude 7.0 or above in China and found that among them, 85.7% of the earthquakes had preceding ionospheric anomalies, most of which occurred within 7 days before the earthquake, and only the M8.1 earthquake in the west Kunlun Pass in 2001 had anomalies 14 days before the earthquake. All the anomalies were concentrated between 11:00 and 17:00 local time, and the amplitude of the ionospheric disturbance exhibits varying degrees of nonlinear correlation with the earthquake magnitude, focal depth, and epicenter distance.…”

Section: Introductionmentioning

confidence: 99%

A Method for Detecting Ionospheric TEC Anomalies before Earthquake: The Case Study of Ms 7.8 Earthquake, February 06, 2023, Türkiye

Feng,

Xiao,

Chen

et al. 2023

Remote Sensing

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The ionospheric anomalies before an earthquake may be related to earthquake preparation. The study of the ionospheric anomalies before an earthquake provides potential value for earthquake prediction. This paper proposes a method for detecting ionospheric total electron content (TEC) anomalies before an earthquake, taking the MS 7.8 earthquake in Türkiye on 6 February 2023 as an example. First, the data of four ground-based GNSS stations close to the epicenter were processed by using the sliding interquartile range method and the long short-term memory (LSTM) network. The anomaly dates detected by the two methods were identified as potential pre-earthquake TEC anomaly dates after eliminating solar and geomagnetic interference. Then, by using the sliding interquartile range method to process and analyze the CODE GIM (Center for Orbit Determination in Europe, Global Ionospheric Map) data from a global perspective, we further verified the existence of TEC anomalies before the earthquake on the above TEC anomaly days. Finally, the influence of the equatorial ionospheric anomaly (EIA) on the TEC anomaly disturbance was excluded. The results show that the ionospheric TEC anomalies on January 20, January 27, February 4, and February 5 before the Türkiye earthquake may be correlated with the earthquake.

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Section: Introductionmentioning

confidence: 99%