Probable Surface Latent Heat Flux Anomalies before the 2010 Chile
详细信息
- 责任者：Chen Meihua (Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Deng Zhihui
- 刊名：Chinese Journal of Geophysics
- 出版年：2011
- 卷期：54(7)
- 关键词：地震前兆 ; precursor ; 智利地震2010 ; Chile earthquake 2010 ; 智利 ; Chile
- 页码：p.1738-1744
- 图表：3 illus., 16 refs.
- 分类号：0500
- 出版序号：75
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
The temporal and spatial variations of surface latent heat flux （SLHF） before and after the Ms8.8 earthquake occurred off the coast of the Maule Region of Chile on 27 February 2010 are summarized and the relationship between the SLHF anomaly and the variation of surface temperature is discussed also. The analysis results show： （1） Three stages of significant SLHF anomalies can be observed before the main earthquake and its aftershocks, the first one occurred one month before the mainshock in the epicentral area and its southeast land area, the second one which distributed northwest towards to the subduction zone occurred one week before the mainshock in the sea of southwest of the epicenter and the third one occurred one week before theaftershocks on 15 March 2010 in the sea of southwest of the epicenter and the northern part of the subduction zone. （2） The anomalies appeared firstly in the back-arc region where the volcanic activities were very intense in recent decades, and then propagated to subduction zone and adjacent sea area, that might be the result of the crust deformation of the subduction zone prior to the earthquake. （3） Surface temperature anomalies were found when the SLHF anomaly occurred on the land region. However, there are not any surface temperature anomalies could be mentioned when the SI.HF anomaly occurred on the sea, which might be due to high heat capacity of water slowing down the temperature increase.