%0 Journal Article %A Jing Feng %A Shen Xuhui %A Kang Chunli %A Xiong Pan %A Sun Ke %T Variation of Outgoing Longwave Radiation around the Time of New Zealand Earthquake M7.1, 2010 %D 2012 %R 10.11867/j.issn.1001-8166.2012.09.0979 %J Advances in Earth Science %P 979-986 %V 27 %N 9 %X

The variation characteristics of outgoing longwave radiation (OLR) around the time of New Zealand Earthquake M7.1 September 3, 2010 have been analyzed based on eleven years (20012011) background data using vorticity background method. The results indicated that the maximum increase of OLR was found in the month of the main shock and the position of the variation was distributed in the southwest of the epicenter. This variation was the most remarkable during the annual monthly data and monthly data in September from 2001 to 2011, which can be considered as the reflection to this earthquake. Six earthquakes with the magnitude greater than 7.0 in this region from 2001 to 2011 have been analyzed using the same method. The results have shown that OLR anomalies have been detected in three continental earthquakes and without anomalies in three coastal earthquakes. For comparison, the published reports related to OLR seismic studies have been retrieved. Only two coastal earthquakes (M8.7 off the west coast of northern Sumatra earthquake of December 2004 and M7.0 Haiti earthquake of January 2010) have been detected with OLR anomalies. According to the global distribution of cloud amount, the two regions of Sumatra and Haiti earthquakes are covered by the minimum cloud amount in global ocean. But the region of Zealand earthquake is covered by the maximum cloud amount in global ocean. So, it is believed that OLR is more sensitive to continental earthquakes than coastal earthquakes in reflecting seismic thermal infrared anomalies because water vapor and cloud can absorb much of surface outgoing infrared radiation.

%U http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2012.09.0979