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ID:37634729
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页数:11页
时间:2019-05-27
《2015年尼泊尔地震的震前电离层异常探测_姚宜斌》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第45卷第4期测绘学报Vol.45,No.42016年4月ActaGeodaeticaetCartographicaSinicaApril,2016引文格式:姚宜斌,翟长治,孔建,等.2015年尼泊尔地震的震前电离层异常探测[J].测绘学报,2016,45(4):385-395.DOI:10.11947/j.AGCS.2016.20150384.YAOYibin,ZHAIChangzhi,KONGJian,etal.ThePre-earthquakeIonosphereAnomalyofthe2015NepalEarthquake[J].ActaGeodaeticaetCar
2、tographicaSinica,2016,45(4):385-395.DOI:10.11947/j.AGCS.2016.20150384.2015年尼泊尔地震的震前电离层异常探测姚宜斌1,2,3,翟长治1,孔建4,刘磊11.武汉大学测绘学院,湖北武汉430079;2.武汉大学地球空间环境与大地测量教育部重点实验室,湖北武汉430079;3.地球空间信息技术协同创新中心,湖北武汉430079;4.武汉大学中国南极测绘研究中心,湖北武汉430079ThePre-earthquakeIonosphereAnomalyofthe2015NepalEarthquake1,2,3,ZH
3、AIChangzhi1,KONGJian4,LIULei1YAOYibin1.SchoolofGeodesyandGeomatics,WuhanUniversity,Wuhan430079,China;2.KeyLaboratoryofGeospaceEnvironmentandGeodesy,MinistryofEducation,WuhanUniversity,Wuhan430079,China;3.CollaborativeInnovationCenterforGeospatialTechnology,Wuhan430079,China;4.ChineseAntarct
4、icCenterofSurveyingandMapping,Wuhan430079,ChinaAbstract:Anionosphericanomalydetectionmethodbasedonsingularspectrumanalysisisintroducedfirstly.WiththeTECtimesequenceofGIMgridpointsaroundtheNepalearthquakeepicenter,thepositiveionosphericanomaliesaredeterminedon23Aprilaroundtheeasternregionoft
5、heepicenter.Usingthetwo-dimensionalionosphericanomaliesmap,furtheranalysisistakentocomfirmtheionosphericpositiveanomalyareadistributingfrom25°Nto37.5°N,90°Eto110°E,andtheanomalytimerangingUT9:00toUT15:00on23April,2015.ThedataofcrustalmovementobservationnetworkofChinaissuedtoanalyzetheSTECfl
6、uctuationchangesofIPP(ionospherepiecepiont)trajectoriesintheabnormalarea,anditisfoundthaton23ApriltheSTECvaluesofIPPtrajectoriespassingthroughtheabnormalareaareobviouslylargerthantheonesafewdaysafterandbeforetheearthquaketime,andreturnedtothenormallevelafterleavingtheabnormalarea.Lastly,the
7、CIT(computerizedionospheretomography)methodisusedtopresentthe3Dionosphericanomaliesdistribution,anditisfoundthat,atUT9:00—UT15:00on23Aprilthepeakofionosphericpositiveanomalyontheeasternregionoftheepicenterisapproximatelyat(30°N,115°E),withthealtituderang
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