STUDY ON IONOSPHERIC TEC ANOMALY PRIOR TO WENCHUAN Ms 8.0 EARTHQUAKE
Zhu Fuying1,2) ;Wu Yun1,2) ;Lin Jian1,2,3) ;Zhou Yiyan1,2) ;Xiong Jing1,2) ; and Yang Jian1,2)
1)Institute of Seismology, CEA, Wuhan 4300712)Crustal Movement Laboratory, Wuhan 4300713)Rearch Center of Wuhan University, Wuhan 430079
Abstract An Ms8.0 earthquake struck Wenchuan in Sichuan province on May 12th 2008 and had resulted in severe damage. On the basis of the GPS observation data from the reference stations of Crustal Movement Observational Network of China, the continuous 31day TEC values over whole China were computed, examined and compared with two statistical analysis method,both the results showed that the ionospheric TEC anomaly did exist 1-6 days prior to the earthquake in the region, the apparent anomalous reduction of TEC occurred on most of these days except the May 9th on which the TEC value anomalously increase evidently, and it was also shown that the anomalous crest of the TEC moved toward equator. Seeing the time was close to the moment when the earthquake occurred, it can be concluded that the existent ionospheric anomaly is possibly related to the earthquake after excluding all the other possible factors.
Key words :
Global Positioning System(GPS)
Total Electron Content(TEC)
ionospheric anomaly
Wenchuan Ms8.0 earthquake
precursor
Received: 01 January 1900
Corresponding Authors:
Zhu Fuying
Cite this article:
Zhu Fuying,Wu Yun,Lin Jian et al. STUDY ON IONOSPHERIC TEC ANOMALY PRIOR TO WENCHUAN Ms 8.0 EARTHQUAKE[J]. , 2008, 28(6): 16-21.
Zhu Fuying,Wu Yun,Lin Jian et al. STUDY ON IONOSPHERIC TEC ANOMALY PRIOR TO WENCHUAN Ms 8.0 EARTHQUAKE[J]. jgg, 2008, 28(6): 16-21.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2008/V28/I6/16
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