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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
© Author(s) 2013. This work is distributed
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Research article
29 May 2013
Review status
A revision of this discussion paper for further review has not been submitted.
Quasi-synchronous ionospheric and surface latent heat flux anomalies before the 2007 Pu'er earthquake in China
K. Qin1, L. X. Wu1,2, X. Y. Ouyang3, X. H. Shen3, and S. Zheng2 1School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, China
2Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs/Ministry of Education of China (Beijing Normal University), Beijing, China
3Institute of Earthquake Science, China Earthquake Administration, Beijing, China
Abstract. Pre-earthquake ionospheric and thermal anomalies are two widely-reported short-term earthquake precursors. This paper attempts to examine the possible relationship between the ionospheric anomaly and the thermal anomaly related to the 2007 Ms =6.4 Pu'er earthquake. The spatio-temporal statistical analyses of multi-years SLHF data from USA NCEP/NCAR Reanalysis Project reveal that local SLHF enhancements appeared 11, 10 and 7 days before the Pu'er earthquake, respectively. As contrasted to the formerly reported local ionospheric Ne enhancement 9 days before the shocking observed by DEMETER satellite, it is discovered that the SLHF and Ne anomalies are quasi-synchronous and have nice spatial correspondence with the epicentre and the local active faults. Based on current physical models presented, we suggest that the air ionization in Pu'er seismogenic process, possible resulted from radon leaking out and subsequent alpha particles emitting, and/or positive holes activating and recombining, is the common cause of the observed ionospheric and SLHF anomalies before the Pu'er earthquake. This is valuable for understanding the seismogenic coupling processes and for recognizing earthquake anomaly with multiple parameters from integrated Earth observation system.

Citation: Qin, K., Wu, L. X., Ouyang, X. Y., Shen, X. H., and Zheng, S.: Quasi-synchronous ionospheric and surface latent heat flux anomalies before the 2007 Pu'er earthquake in China, Nat. Hazards Earth Syst. Sci. Discuss., 1, 2439-2454, doi:10.5194/nhessd-1-2439-2013, 2013.
K. Qin et al.
Interactive discussionStatus: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
SC C326: 'Suggestions to improve the paper', Angelo De Santis, 14 Jun 2013 Printer-friendly Version 
RC C411: 'Review', Anonymous Referee #1, 30 Jun 2013 Printer-friendly Version 
RC C520: 'Review', Anonymous Referee #2, 15 Jul 2013 Printer-friendly Version 
EC C616: 'suggestions for authors', Fabrizio Masci, 25 Jul 2013 Printer-friendly Version 
K. Qin et al.
K. Qin et al.


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