Spatial and temporal variations of total electron content (TEC) and outgoing longwave radiation (OLR) during the period of greater earthquakes near the Indian subcontinent

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• 作者：C. Prasanna Simha ; Annam Navaneeth ; K. M. Rao ; B. K. Rastogi…
• 关键词：Total electron content (TEC) ; Outgoing longwave radiation (OLR) ; Sea surface temperature (SST)
• 刊名：Natural Hazards
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：80
• 期：3
• 页码：2105-2114
• 全文大小：2,226 KB
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• 作者单位：C. Prasanna Simha (1) <br> Annam Navaneeth (1) <br> K. M. Rao (1) <br> B. K. Rastogi (1) <br> G. Pavan Kumar (1) <br> P. Mahesh (1) <br> V. N. Sridhar (2) <br> A. K. Shukla (2) <br><br>1. Institute of Seismological Research Centre (I.S.R), Gandhinagar, Gujarat, 382009, India <br> 2. Space Application Centre, Ahmadabad, Gujarat, India <br>
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences<br>Hydrogeology<br>Geophysics and Geodesy<br>Geotechnical Engineering<br>Civil Engineering<br>Environmental Management<br>
• 出版者：Springer Netherlands
• ISSN：1573-0840

文摘

This paper purports the temporal and spatial variations of total electron content (TEC), outgoing longwave radiation (OLR) and sea surface temperature during the greater earthquake regime. Nighttime TEC variations have been observed to be lower than those of the daytime. They were in the range of 10–30 TECU (µ = 16 TECU) over nighttime, whereas 12–40 TECU (µ = 26 TECU) during daytime. The coefficient of variation (CV) is of 32 % during the daytime and 51 % over the nighttime by using the IRI-2012 model (as per the boundary condition and grid-level output during event period). Latitude and longitudinal variations of TEC values integrated over the preparatory zone with in 5-h limits are in the range of 8–48 TECU (µ = 30 TECU, CV = 45 %) and 14–48 TECU (µ = 28 TECU, CV = 37 %). Mapping for the 2 days anomalies of OLR have good influence with the effect of greater earthquake; except the three events, it has increased from 20 to 100 watts/m2. The detailed synthesis of this paper has showered light on the necessity of spatial variation of the TEC apart from temporal variations. Keywords Total electron content (TEC) Outgoing longwave radiation (OLR) Sea surface temperature (SST)