{"title":"双探头法探测到的地震前电离层电场不规则现象","authors":"S. Makhlouf, M. Djebli","doi":"10.1134/S0016793223600236","DOIUrl":null,"url":null,"abstract":"<p>Based on the double probe method, we investigated the ionospheric preseismic electric effects for the strong Chile earthquake of magnitude M = 8.8 that occurred on February 27, 2010, at 06:3414 universal time (UT). To correlate the electrical disturbance to natural geophysical activities in the ionosphere associated with the earthquake, we used a new approach to analyze these disturbances a few days before the event, based on DEMETER spacecraft collected data in the ultra low frequency (ULF) band. The double probes method and the calculated preseismic ionospheric electric field resulting from the potential difference between two electrical probes of ICE (Instrument Champ Electrique) onboard the DEMETER satellite are investigated. Once the effect of the satellite motion is canceled, it is found that the disturbance is caused only by the telluric activity. Moreover, the investigation of the collected data illustrates a clear correlation between preseismic electrical disturbances and ionospheric plasma parameters recorded near the future epicenter. The strongest ionospheric electrical disturbances are located near the future epicenter and close to the geomagnetic conjugate points.</p>","PeriodicalId":55597,"journal":{"name":"Geomagnetism and Aeronomy","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preseismic Ionospheric Electric Field Irregularities Detected by the Double Probes Method\",\"authors\":\"S. Makhlouf, M. Djebli\",\"doi\":\"10.1134/S0016793223600236\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Based on the double probe method, we investigated the ionospheric preseismic electric effects for the strong Chile earthquake of magnitude M = 8.8 that occurred on February 27, 2010, at 06:3414 universal time (UT). To correlate the electrical disturbance to natural geophysical activities in the ionosphere associated with the earthquake, we used a new approach to analyze these disturbances a few days before the event, based on DEMETER spacecraft collected data in the ultra low frequency (ULF) band. The double probes method and the calculated preseismic ionospheric electric field resulting from the potential difference between two electrical probes of ICE (Instrument Champ Electrique) onboard the DEMETER satellite are investigated. Once the effect of the satellite motion is canceled, it is found that the disturbance is caused only by the telluric activity. Moreover, the investigation of the collected data illustrates a clear correlation between preseismic electrical disturbances and ionospheric plasma parameters recorded near the future epicenter. The strongest ionospheric electrical disturbances are located near the future epicenter and close to the geomagnetic conjugate points.</p>\",\"PeriodicalId\":55597,\"journal\":{\"name\":\"Geomagnetism and Aeronomy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-03-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geomagnetism and Aeronomy\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0016793223600236\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geomagnetism and Aeronomy","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0016793223600236","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Preseismic Ionospheric Electric Field Irregularities Detected by the Double Probes Method
Based on the double probe method, we investigated the ionospheric preseismic electric effects for the strong Chile earthquake of magnitude M = 8.8 that occurred on February 27, 2010, at 06:3414 universal time (UT). To correlate the electrical disturbance to natural geophysical activities in the ionosphere associated with the earthquake, we used a new approach to analyze these disturbances a few days before the event, based on DEMETER spacecraft collected data in the ultra low frequency (ULF) band. The double probes method and the calculated preseismic ionospheric electric field resulting from the potential difference between two electrical probes of ICE (Instrument Champ Electrique) onboard the DEMETER satellite are investigated. Once the effect of the satellite motion is canceled, it is found that the disturbance is caused only by the telluric activity. Moreover, the investigation of the collected data illustrates a clear correlation between preseismic electrical disturbances and ionospheric plasma parameters recorded near the future epicenter. The strongest ionospheric electrical disturbances are located near the future epicenter and close to the geomagnetic conjugate points.
期刊介绍：
Geomagnetism and Aeronomy is a bimonthly periodical that covers the fields of interplanetary space; geoeffective solar events; the magnetosphere; the ionosphere; the upper and middle atmosphere; the action of solar variability and activity on atmospheric parameters and climate; the main magnetic field and its secular variations, excursion, and inversion; and other related topics.
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