Observations and simulations of seismoionospheric GPS total electron content anomalies before the 12 January 2010 M7 Haiti earthquake

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50453

Title:	Observations and simulations of seismoionospheric GPS total electron content anomalies before the 12 January 2010 M7 Haiti earthquake
Authors:	Liu,JY;Le,H;Chen,YI;Chen,CH;Liu,L;Wan,W;Su,YZ;Sun,YY;Lin,CH;Chen,MQ
Contributors:	太空科學研究所
Keywords:	ELECTROMAGNETIC DRIFTS;MODEL;REGION;ATMOSPHERE;MIDDLE;WINDS;SOLAR
Date:	2011
Issue Date:	2012-03-27 17:32:22 (UTC+8)
Publisher:	國立中央大學
Abstract:	In this paper, the total electron content (TEC) of the global ionosphere map (GIM) is used to detect seismoionospheric anomalies associated with the 12 January 2010 M7 Haiti earthquake, and an ionospheric model is applied to simulate the detected anomalies. The GIM temporal variation shows that the TEC over the epicenter significantly enhances on 11 January 2010, 1 day before the earthquake. The latitude-time-TEC (LTT) plots reveal three anomalies: (1) the northern crest of equatorial ionization anomaly (EIA) moves poleward, (2) the TECs at the epicenter and its conjugate increase, and (3) the TECs at two dense bands in the midlatitude ionosphere of 35 degrees N and 60 degrees S further enhance. The spatial analysis demonstrates that the TEC enhancement anomaly appears specifically and persistently in a small region of the northern epicenter area. The simulation well reproduces the three GIM TEC anomalies, which indicate that the dynamoelectric field of the ionospheric plasma fountain might have been perturbed by seismoelectric signals generated around the epicenter during the earthquake preparation period.
Relation:	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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